Chapter L: INTERMEDIUM, Fries. Resembling L. purpureum, but the calyx-teeth (2)

Aster _aestivus_, 262
amethystinus, 260
angustus, 264
anomalus, 258
azureus, 258
_carneus_, 261
concinnus, 260
concolor, 258
cordifolius, 259
corymbosus, 255
diffusus, 261
Drummondii, 259
dumosus, 260
ericoides, 260
Fendleri, 257
_flexuosus_, 264
gracilis, 256
grandiflorus, 257
Herveyi, 256
infirmus, 263
junceus, 262
laevis, 259
linariifolius, 263
Lindleyanus, 259
_linifolius_, 264
longifolius, 262, _262_
macrophyllus, 256
_miser_, 261
modestus, 257
multiflorus, 260
nemoralis, 264
Novae Angliae, 257
Novi Belgii, 262
oblongifolius, 257
paludosus, 255
paniculatus, 261
patens, 258
patulus, 262
polyphyllus, 260
prenanthoides, 263
ptarmicoides, 264
puniceus, 263
radula, 256
sagittifolius, 259
salicifolius, 261
sericeus, 257
Shortii, 258
_simplex_, 261
spectabilis, 256
subulatus, 264
surculosus, 256
tardiflorus, 262
tenuifolius, _261_, 264
Tradescanti, _261_, 261
turbinelius, 259
umbellatus, 263
undulatus, 258
vimineus, 260
virgatus, 259

Aster, Golden, 244
White-topped, 254

Asterella, 729

Astilbe, 169

Astragalus, 134

Atamasco Lily, 516

Atriplex, 433

_Atropis_, 668

Avena, 653

Avens, 156

Awlwort, 69

_Azalea_, 320
Alpine, 322

Azolla, 701

Baccharis, 266

Baked-apple Berry, 154

Baldwinia, 285

Ballota, 420

Balm, 412
Bee, 414
Horse, 406

Balm-of-Gilead, 487

Balsam, 105

Balsam Poplar, 487

Baneberry, 47

Baptisia, 125

Barbarea, 70

Barberry, 52

Barley, 672

Bartonia, 352

Bartsia, 392

Basil, 409, 412

Bass-wood, 101

Bay, Loblolly, 96
Red, 447
Rose, 320

Bayberry, 469

Bazzania, 710

Bean, Indian, 399
Kidney, 144
Sacred, 55
Wild, 144

Bearberry, 315

Beard-tongue, 381

Beckmannia, 628

Bedstraw, 225

Beech, 479
Blue, 474
Water, 474

Beech-drops, 394
False, 326

Beggar-lice, 362

Beggar-ticks, 284

Belamcanda, 515

Bellflower, 308

Bellis, 253

Bellwort, 527

Benjamin-bush, 447

BERBERIDACEAE, 52

Berberis, 52

Berchemia, 111

Bergamot, Wild, 414

Berlandiera, 271

Berula, 207

Betony, Wood, 392

Betula, 471

Bidens, 284

Bigelovia, 245

Bignonia, 398

BIGNONIACEAE, 398

Bilberry, 312

Bilsted, 180

Bindweed, 369
Black, 442

Birch, 471

Birthroot, 530

Birthwort, 445

Bishop's-cap, 171

Bishop-weed, Mock, 209

Bitter-nut, 469

Bittersweet, 373
Climbing or Shrubby, 110

Bitter-weed, 273

Blackberry, 155

Bladder Ketmia, 100

Bladdernut, 118

Bladderwort, 395

Blasia, 724

Blazing-star, 242, 532

Blepharostoma, 711

_Blepharozia_, 709

Blephilia, 415

_Bletia_, 501

Blite, Coast, 432

Blite, Sea, 435
Strawberry, 432

_Blitum_, 432, 433

Bloodroot, 58

Bloodwort Family, 512

Bluebell, 364

Blueberry, 312

Bluebottle, 297

Blue-curls, 405

Blue-hearts, 388

Blue-joint, 650, 671

Blue-stem, 671

Blue-tangle, 311

Bluets, 223

Blue-weed, 367

Boehmeria, 466

Bois d'Arc, 464

Boltonia, 253

_Bonamia_, 370

Boneset, 241

Borage Family, 360

BORRAGINACEAE, 360

Borrichia, 277

Botrychium, 693

Bouncing Bet, 83

Bouteloua, 655

Bowman's-root, 154

Boxberry, 316

Box-elder, 118

Boykinia, 170

Brachychaeta, 253

Brachyelytrum, 644

Bracken, 681

Brake, 681
Cliff, 682
Rock, 682

Bramble, 154

Brasenia, 55

Brassica, 72

Breweria, 370

Brickellia, 241

Briza, 663

_Brizopyrum_, 663

BROMELIACEAE, 511

Bromus, 669

Brooklime, American, 386

Brookweed, 332

Broom, 127

Broom-rape, 395
Naked, 394

Brunella, 418

Brunnichia, 443

Bryanthus, 318

Buchloe, 657

Buchnera, 388

Buckbean, 353

Buckeye, 115

Buckthorn, 111, 332

Buckwheat, 443
Climbing False, 443

Buda, 89

Buffalo-berry, 449

Buffalo-nut, 451

Bugbane, 47
False, 39

Bugleweed, 408

Bugloss, 367

Bugseed, 434

Bulrush, 578

Bumelia, 332

Bunchberry, 214

Bunch-flower, 533

Bupleurum, 206

Burdock, 295

Burmannia, 497

BURMANNIACEAE, 496

Burnet, 161

Burning-bush, 110

Bur-reed, 547

Butter and eggs, 379

Buttercup, 40

Butterfly-weed, 340

Butternut, 467

Butterweed, 265, 293

Butterwort, 397

Button-bush, 224

Buttonweed, 225

Buttonwood, 464

Cabbage, Skunk, 550

Cabomba, 55

Cacalia, 294

CACTACEAE, 196

Cactus Family, 196

Cakile, 74

_Caladium_, 550

Calamagrostis, 649, 651

Calamint, 411

Calamintha, 411

Calamus, 557

Calico-bush, 319

Calla, 550

Callicarpa, 403

Callirrhoe, 98

Callitriche, 182

Calluna, 318

Calophanes, 400

Calopogon, 504

Caltha, 44

CALYCANTHACEAE, 167

Calycanthus, 167

Calycocarpum, 51

_Calypogeia_, 713

Calypso, 499

_Calystegia_, 369, 370

Camassia, 523

Camelina, 69

Camellia Family, 95

Campanula, 308

CAMPANULACEAE, 307

Campion, 83

Camptosorus, 685

Cancer-root, 394

Cane, 674

Cannabis, 463

Caper Family, 74

CAPPARIDACEAE, 74

CAPRIFOLIACEAE, 216

Capsella, 73

Caraway, 208

Cardamine, 64

Cardinal-flower, 305

Carduus, 296

Carex, 587
acutiformis, 598
adusta, 621, _621_
aestivalis, 604
_alata_, 622
alopecoidea, 615
alpina, 598
_angustata_, 600
_aperta_, 600
aquatilis, 600
_arcta_, 619
arctata, 603
arenaria, 616
_arida_, 620
_aristata_, 598
atrata, 599
aurea, 610
Backii, 613
_Barrattii_, 602
_Bebbii_, 620
_Boottiana_, 611
bromoides, 619
bullata, 594
_Buxbaumii_, 599
canescens, 618
capillaris, 603
capitata, 617
Careyana, 608
castanea, 603
cephaloidea, 617
cephalophora, 617
chordorhiza, 614
communis, 612
_comosa_, 596
conjuncta, 614
conoidea, 607
Crawei, 606
crinita, 601
_cristata_, 620
Crus-corvi, 614
Davisii, 605
debilis, 604, _604_
decomposita, 614
deflexa, 611
Deweyana, 619
digitalis, 608
_disticha_, 615
eburnea, 610
echinata, 618
_Emmonsii_, 611
exilis, 617
extensa, 606
filiformis, 597
_flaccosperma_, 605
flava, 606
flexilis, 603
foenea, 621, _622_
folliculata, 592
formosa, 605
Fraseri, 613
fusca, 599
gigantea, 593
_glabra_, 604
glaucodea, 605
gracillima, 604
grandis, 593
granularis, 605
gravida, 615
Grayii, 592
grisea, 605
gynandra, 601
gynocrates, 617
hirta, 597
Hitchcockiana, 607
Houghtonii, 597
hystricina, 596
intumescens, 592
irrigua, 602
Jamesii, 613
_Knieskernii_, 603
_lagopodioides_, 620
lanuginosa, 597
laxiculmis, 608
laxiflora, 607
lenticularis, 600
leporina, 622
limosa, 602
_limula_, 599
littoralis, 602
livida, 610
longirostris, 603
_lupuliformis_, 593
lupulina, 593
lurida, _593_, 595
Magellanica, 602
maritima, 601
_Meadii_, 609
Michauxiana, 592
_miliacea_, 601
miliaris, 593
_mirabilis_, 622
monile, 594
Muhlenbergii, 617
muricata, 616
Muskingumensis, 620
nigro-marginata, 613
Norvegica, 619
Novae-Angiae, _611_, 612
_OEderi_, 606
oligocarpa, 607
oligosperma, 593
_Olneyi_, 595
pallescens, 606
_paludosa_, 598
panicea, 609
pauciflora, 592
pedunculata, 610
Pennsylvanica, 612
picta, 610
_pinguis_, 621
plantaginea, 609
platyphylla, 608
polymorpha, 609
polytrichoides, 613
praecox, 612
prasina, 601
Pseudo-Cyperus, 596
ptychocarpa, 608
pubescens, 613
_pulla_, 594
rariflora, 602
_retrocurva_, 608
_retroflexa_, 616
retrorsa, 598
Richardsoni, 610
_rigida_, 599
riparia, 598
rosea, 616
_rostrata_, 592
_rotundata_, 593
salina, 601
Saltuensis, 609
Sartwellii, 615
scabrata, 597
Schweinitzii, 595
scirpoidea, 611
_scirpoides_, 618
scoparia, 620
Shortiana, 596
siccata, 619
silicea, 621
sparganioides, 616
squarrosa, 596
_stellulata_, 619
stenolepis, 596
stenophylla, 614
_Steudelii_, 613
stipata, 614
straminea, 621
striata, 597
stricta, 599
subulata, 592
_Sullivantii_, 605
sychnocephala, 622
tenella, 616
tentaculata, 595
tenuiflora, 619
teretiuscula, 614
tetanica, 609
_Torreyi_, 606
torta, 600
tribuloides, 620
triceps, 602
trichocarpa, 698
trisperma, 619
Carex Tuckermani, 594
umbellata, 612
utriculata, 594
_vaginata_, 609
varia, 611, _612_
_Vaseyi_, 594
venusta, 604
vestita, 597
virescens, 602
_vitilis_, 618
vulgaris, 599
vulpinoidea, 615
Willdenovii, 613
_Woodii_, 609

Carnation, 83

Carpetweed, 198

Carpinus, 474

Carrion-flower, 520

Carrot, 201

Carum, 208

Carya, 468

CARYOPHYLLACEAE, 82

Cashew Family, 118

Cassandra, 317

Cassena, 108

Cassia, 147

Cassiope, 318

Castanea, 479

Castelleia, 390

Castor-oil Plant, 460

Catalpa, 399

Cat-brier, 519

Catchfly, 83

Catgut, 133

Catmint, 416

Catnip, 416

Cat-tail Flag, 547

Caucalis, 201

Caulophyllum, 52

Ceanothus, 112

Cedar, Red, 494
White, 493, 494

Cedronella, 416

Celandine, 58

CELASTRACEAE, 109

Celastrus, 110

Celtis, 463, 734

Cenchrus, 634

Centaurea, 297

Centaury, 347

Centrosema, 145

Centunculus, 332

Cephaianthus, 234

Cephalozia, 711

Cerastium, 88

CERATOPHYLLACEAE, 488

Ceratophyllum, 488

Cercis, 147

_Cesia_, 723

Chaerophyllum, _206_, 209

Chaetopappa, 253

Chaffseed, 391

Chaffweed, 332

Chamaecyparis, 493

Chamaelirium, 531

Chamaesaracha, 374

Chamomile, 288
Wild, 289

Charlock, 72, 74

Cheat, 670

Checkerberry, 316

Cheilanthes, 681

Chelidonium, 58

Chelone, 381

CHENOPODIACEAE, 430

Chenopodium, 431

Cherry, 151

Cherry, Ground, 375
Sand, 152

Chervil, 206

Chess, 670

Chestnut, 479
Horse, 115

Chickweed, 86
Forked, 426
Indian, 198
Jagged, 87
Mouse-ear, 88

Chicory, 298

Chiloscyphus, 716

Chimaphila, 322

Chinquapin, 479
Water, 55

Chiogenes, 314

Chionanthus, 337

Chives, 522

Chokeberry, 164

Chondrilla, 303

Chrysanthemum, 289

Chrysogonum, 271

Chrysopogon, 638

Chrysopsis, 244

Chrysosplenium, 172

Cichorium, 298

Cicuta, 208

Cimicifuga, 47

Cinna, 649

Cinquefoil, 158

Circaea, 193

_Cirsium_, 295, 296

Cissus, 114

CISTACEAE, 76

Cladium, 586

Cladothrix, 734

Cladrastis, 126

Clary, 413

Claytonia, 91, 733

Clear-weed, 465

Cleavers, 225

Clematis, 35

Cleome, 75, 733

Cleomella, 75

Clethra, 322

Clintonia, 527

Clitoria, 145

Clotbur, 274

Cloudberry, 154

Clover, 128
Bush, 141
Prairie, 132
Sweet, 129

Club-moss, 695, 697

Cnicus, 295, _297_

Cocculus, 51

_Cochlearia_, 70

Cockle, 85

Cocklebur, 274

Coelopleurum, 205

Coffee, Wild, 219

Coffee-tree, Kentucky, 148

Cohosh, 47, 52

Colic-root, 512

Collinsia, 380

Collinsonia, 406

_Collomia_, 356

Coltsfoot, 291
Sweet, 292

Columbine, 45

Columbo, American, 352

Comandra, 450

Comfrey, 367
Wild, 362

Commelina, 538

COMMELINACEAE, 538

Compass-plant, 270

COMPOSITAE, 230

_Comptonia_, 470

Cone-flower, 270
Purple, 275

CONIFERAE, 489

Conioselinum, 202

Conium, 209

Conobea, 383

Conocephalus, 728

Conopholis, 394

Convallaria, 524

CONVOLVULACEAE, 367

Convolvulus, 369

Coptis, 45

Coral-berry, 220

Coral-root, 500

Corallorhiza, 500

Corema, 488

Coreopsis, 281

Corispermum, 434

CORNACEAE, 213

Cornel, 214

Corn-salad, 228

Cornus, 214

Coronilla, 138

Corpse-plant, 325

Corydalis, 61

Corylus, 473

Cottonwood, 487

Cowberry, 314

Cowslip, 321
American, 328
Virginian, 364

Cow-wheat, 393

Crab-apple, 164

Cranberry, 312, 314

Cranberry-tree, 217

Cranesbill, 103

Crantzia, 205

CRASSULACEAE, 170

Crataegus, 165

Cress, Bitter, 64
Mouse-ear, 72
Penny, 73
Rock, 65
Spring, 65
Swine, 74
Water, 69
Winter, 70

Crepis, 300

Cross-vine, 398

Crotalaria, 127

Croton, 457

Crotonopsis, 458

Crowberry, 487
Broom, 488

Crowfoot, 40

Crown-beard, 280

CRUCIFERAE, 61

_Crypsis_, 640

Cryptogramme, 682

Cryptotaenia, 207

Ctenium, 654

Cuckoo-flower, 65

Cucumber, 194
Bur, 195

Cucumber-root, Indian 529

Cucumber-tree, 49

Cucurbita, 196

CUCURBITACEAE, 194

Cudweed, 268

Culver's-physic, 386

Culver's-root, 386

Cunila, 409

Cuphea, 186

Cup-plant, 271

_Cupressus_, 493

Cupseed, 51

CUPULIFERAE, 470

Currant, 174
Indian, 220

Cuscuta, 369

Custard-apple Family, 50

Cyclanthera, 196

Cycloloma, 431

Cymopterus, 203

Cynodon, 654

Cynoglossum, 362, _363_

_Cynthia_, 298

CYPERACEAE, 567

Cyperus, 569

Cypress, 493

Cypress-vine, 368

Cypripedium, 510

Cystopteris, 689

Cytisus, 127

Dactylis, 663

_Dactyloctenium_, 656

Dahoon Holly, 108

Daisy, 253
Ox-eye, 289
White, 289

Dalea, 132

Dalibarda, 156

Dame's-violet, 71

Dandelion, 303
Dwarf, 297
Fall, 299
False, 303

Dangleberry, 311

Danthonia, 654

Daphne, 448

Darnel, 671

Datura, 377

Daucus, 201

Day-flower, 538

Dead-nettle, 420

Decodon, 186

Decumaria, 173

Deerberry, 312

Delphinium, 46

Dentaria, 64

Deschampsia, 652

Desmanthus, 149

Desmodium, 138

Devil's-bit, 531

Dewberry, 155

_Deyeuxia_, 650

Dianthera, 401

Dianthus, 83

Diapensia, 326

DIAPENSIACEAE, 326

Diarrhena, 662

Dicentra, 60

Dichondra, 368

Dichromena, 577

Dicksonia, 691

Didiplis, 184

Diervilla, 222

Diodia, 225

Dionaea, 179

Dioscorea, 517

DIOSCOREACEAE, 517

Diospyros, 333

Diphylleia, 53

Diplachne, 658

_Diplopappus_, 263

Diplophyllum, 715

DIPSACEAE, 229

Dipsacus, 229

Dirca, 448

Discopleura, 209

Disporum, 526

Distichus, 663, 735

Dittany, 409

Dock, 437
Prairie, 270
Spatter, 56

Dockmackie, 218

Dodder, 370

Dodecatheon, 328

Dogbane, 338

Dogwood, 214

Draba, 67

Dracocephalum, 416

Dragon-head, 416
False, 419

Dragon-root, 549

Drosera, 178

DROSERACEAE, 178

Dryas, 157

Duck's-meat, 552

Duckweed, 552

Dulichium, 573

Dumortiera, 729

Dutchman's-breeches, 60

Dutchman's-pipe, 445

_Duvalia_, 729

Dyer's-weed, 75

Dysodia, 288

Eatonia, 659

EBENACEAE, 333

Ebony Family, 333

Echinacea, 275

Echinocystis, 195

Echinodorus, 556

Echinospermum, 362

Echium, 367

Eclipta, 274

Eel-grass, 496, 565

Eglantine, 164

ELAEAGNACEAE, 448

Elaeagnus, 448

ELATINACEAE, 91

Elatine, 91

Elder, 217
Box, 118
Marsh, 272
Wild, 213

Elecampane, 269

Eleocharis, 573, 735

Elephantopus, 237

Elephant's-foot, 237

Eleusine, 656

Ellisia, 358

Elm, 462

Elodea, 495

Elodes, 95

Elymus, 673

EMPETRACEAE, 487

Empetrum, 487

Enchanter's Nightshade, 193

Engelmannia, 272

Enslenia, 343

Epigaea, 315

Epilobium, 188

Epipactis, 504

Epiphegus, 394

EQUISETACEAE, 675

Equisetum, 676

Eragrostis, 660

Eranthis, 45

Erechtites, 294

Erianthus, 636

Erica, 318

ERICACEAE, 309

Erigenia, 210

Erigeron, 264

ERIOCAULEAE, 566

Eriocaulon, 566

Eriochloa, 629

Eriogonum, 436, 734

Eriophorum, 582

Erodium, 104

Eryngium, 211

Eryngo, 211

Erysimum, 71

Erythraea, 347

Erythronium, 528

Eulophus, 206

Euonymus, 110

Eupatorium, 239

Euphorbia, 452

EUPHORBIACEAE, 451

Euphrasia, 391

Eustoma, 349

Evax, 267

Evening Primrose Family, 186

Everlasting, 267, 268

Evolvulus, 370

Eyebright, 391

Fagopyrum, 443

Fagus, 479

False-mermaid, 104

Farkleberry, 312

Featherfoil, 328

_Fedia_, 229

_Fegatella_, 729

Fennel, 205
Dog, 239

Fennel-flower, 48

Fern, Beech, 686
Bladder, 689
Chain, 683
Christmas, 689
Cinnamon, 693
Climbing, 692
Cloak, 680
Filmy, 692
Flowering, 693
Lip, 681
Sensitive, 690
Shield, 686
Wood, 686

Ferns, 678

Fescue, 668
Sheep's, 669

Festuca, _666_, 668

Fever-bush, 447

Feverfew, 289

Feverwort, 219

FICOIDEAE, 198

Fig, Indian, 197

Figwort, 380

Filago, 267

Filbert, 473

FILICES, 678

Fimbriaria, 728

Fimbristylis, 577

Fiorin, 647

Fir, 492

Fire-weed, 188, 294

Five-finger, 158

Flag, 513
Cat-tail, 547
Sweet, 551

Flax, 101

Fleabane, 264
Marsh, 266

Floating-heart, 353

Floerkea, 104

Flower-de-luce, 513

Fly-poison, 535

Foeniculum, 205

Fog-fruit, 402

Forestiera, 336

Forget-me-not, 364

_Forsteronia_, 338

Fossombronia, 723

Fothergilla, 179

Four-o'clock, 425

Foxberry, 314

Foxglove, False, 389
Mullein, 338

Foxtail, 634

Fragaria, 158

_Frangula_, 112

Frasera, 352

Fraxinus, 335

Fringe-tree, 337

Froelichia, 430

Frog's-bit, American 496

Frost-weed, 76

Frullania, 704, _706_

Fuirena, 583

Fumaria, 61

FUMARIACEAE, 59

Fumitory, 61
Climbing, 66

Gaillardia, 288

Galactia, 146

Galax, 327

Gale, Sweet, 469

Galeopsis, 421

Galingale, 569

Galinsoga, 234, 286

Galium, 225

Gall-of-the-earth 301

Garget, 436

Garlic, 521

Gaultheria, 315

Gaura, 192

Gaylussacia, 311

Gelsemium, 345

Genisca, 127

Gentian, 349
Horse, 219
Spurred, 352

Gentiana, 349

GENTIANACEAE, 346

Geocalyx, 715

GERANIACEAE, 102

Geranium, 103
Feather, 433

Gerardia, 388

Germander, 406

Geum, 156

Gilia, 356

Gillenia, 154

Gill-over-the-ground, 416

Ginger, Wild, 444

Ginseng, 212

Glasswort, 434

Glaucium, 58

Glaux, 331

Gleditschia, 148

Globe-flower, 45

Glyceria, 666, _668_

Glycyrrhiza, 137

Gnaphalium, 268

Goat's-beard 153, 298
False, 169

Goat's-rue, 133

Golden-club, 551

Goldenrod, 246
False, 253
Rayless, 245

Goldthread, 45

Gonolobus, 344

Good-King-Henry 432

Goodyera, 503

Gooseberry, 174

Goosefoot, 431

Gordonia, 93

Gourd Family, 194

Gout-weed, 208

GRAMINEAE, 623

Grape, 113

Grape Hyacinth, 523

Graphephorum, 666

Grass Family, 623

Grass, Barnyard 633
Beak, 584
Bear, 524
Beard 636, 637, 648
Bengal, 634
Bent, 647, 648, 649
Bermuda, 654
Blue, English, 664
Blue, Kentucky, 665
Blue-eyed, 515
Blue-joint, 650, 671
Blue-stem, 671
Bottle, 634
Bottle-brush, 674
Brome, 669
Buffalo, 657
Bur, 634
Canary, 638
Catchfly, 636
Cat's-tail, 644
Cord, 627
Cotton, 582
Couch, 671
Crab, 630, 656
Cut, Rice, 636
Deer, 183
Ditch, 564
Dog's-tail, 656
Drop seed, 643, 645
Eel, 496, 565
Feather, 641
Fescue, 668
Finger, 630
Foxtail, 634, 645
Gama, 635
Goose, 226, 668
Hair, 644, 648, 652
Hedgehog, 634
Herds, 645, 647
Holy, 639
Hungarian, 634
Indian, 638
Joint, 629
June, 665
Lyme, 673
Manna, 666
Marsh, 627
Meadow 663, 665, 667
Melic, 662
Millet, 642
Muskit, 655
Oat, 641, 651, 654
Old-witch, 630
Orange, 95
Orchard, 663
Panic, 629
Pigeon, 634
Porcupine, 641
Quaking, 663
Quick, or Quitch, 671
Rattlesnake, 667
Ray, 671
Redtop, 647, 657, 665
Reed, 627, 649
Rib, 423
Ribbon, 639
Ripple, 423
Rush, 645
Rye, 671, 673
Salt, 627
Sand, 658
Scorpion, 364
Scurvy, 71
Scutch, 654
Seneca, 639
Sesame, 635
Shave, 677
Soft, 652
Spear 663, 665, 668
Spike, 662, 663
Squirrel-tail, 672
Star, 512, 516
Sweet Vernal, 639
Tape, 496
Thin, 648
Timothy, 645
Toothache, 657
Triple-awned, 639
Umbrella, 583
Vanilla, 652
Velvet, 652
Wheat, Awned, 672
White, 336
Whitlow, 67, 68
Wire, 656, 664
Wood, 638
Worm, 346
Yard, 656
Yellow-eyed, 537

Grass of Parnassus, 173

Grass wrack, 565

Gratiola, 384

Greenbrier, 519

Green-dragon, 549

Greenweed, Dyer's, 127

Grimaldia, 729

Grindelia, 244

Gromwell, 365
False, 366

Groundnut, 144, 213

Groundsel, 292

Groundsel tree, 266

Guelder rose, 218

Gum-tree, 215
Sweet, 180

Gutierrezia, 243

Gymnocladus, 148

Gymnomitrium, _721_, 722

Gymnopogon, 655

_Gymnostichum_, 674

Gypsophila, 83

Habenaria, _506_, 506

Hackberry, 463

Hackmatack, 493

HAEMODORACEAE, 512

Halenia, 352

Halesia, 334

HALORAGEAE, 180

HAMAMELIDEAE, 179

Hamamelis, 179

Harbinger-of-spring, 210

Hardhack, 153

Harebell, 308

Harpanthus, 717

Hart's-tongue, 685

Haw, 166
Black, 219

Hawkbit, 298

Hawkweed, 299

Hawthorn, 165

Hazel, Witch, 179

Hazelnut, 473

Heal-all, 419

Heart's-ease, 78, 81

Heather, 318

Heath Family, 309

Hedeoma, 412

Hedysarum, 138

Helenium, 237

Heleochloa, 644

Helianthemum, 76

Helianthus, 277

_Heliophytum_, 362

Heliopsis, 275

Heliotropium (Heliotrope), 361

Hellebore, 45
False, 533

Helleborus, 45

Helonias, 531

Hemerocallis, 523

Hemicarpha, 583

Hemlock, 209, 492
Ground, 494
Water, 208

HEMODORACEAE, 512

Hemp, 463
Indian, 338
Water, 429

Henbane, 376

Hepatica, 34, 38

HEPATICAE, 702

Heracleum, 202

Herb-Robert, 103

Herba-impia, 267

Herberta, 709

Hercules' Club, 213

Herpestis, 383

Hesperis, 71

Heteranthera, 536

Heterotheca, 244

Heuchera, 171

Hexalectris, 501

Hibiscus, 100

Hickory, 468

Hieracium, 299

Hierochloe, 639

High-water Shrub, 272

Hippuris, 182

Hobble-bush, 217

Hoffmanseggia, 148

Hogweed, 273

Hoicus, 652

Holly, 107
Dahoon, 108
Mountain, 109

Holosteum, 87

Honewort, 207

Honeysuckle, 220
Bush, 222

_Honkenya_, 86

Hop, 464

Hop tree, 107

Hordeum, 672

Horehound, 419
Black, 420
Fetid, 420
Water, 408

Hornbeam, 474
Hop, 474

Hornwort, 488

Horse-brier, 520

Horse-chestnut, 115

Horseradish, 70

Horse-sugar, 335

Horsetail, 676

Horse-weed, 265

Hosackia, 130

Hottonia, 328

Hound's-tongue, 362

Houstonia, 222

Huckleberry, 311
Squaw, 312

Hudsonia, 76

Humulus, 464

Huntsman's-cup, 57

Hyacinth, Grape, 523
Wild, 523

Hydrangea, 173

Hydrastis, 48

HYDROCHARIDACEAE, 495

Hydrocotyle, 210, 733

Hydrolea, 360

HYDROPHYLLACEAE, 357

Hydrophyllum, 357

Hymenocallis, 516

Hymenopappus, 286

Hyoscyamus, 376

HYPERICACEAE 92

Hypericum, 92

Hypoxis, 516

Hyssopus (Hyssop) 409
Giant, 415
Hedge, 384

Ilex, 107

ILICINEAE, 107

ILLECEBRACEAE 426

Ilysanthes, 385

Impatiens, 105

Indian-physic 154

Indian-pipe 325

Indian-poke 534

Indigo, 133
False, 125, 131
Wild, 125

Indigofera, 133

Inkberry, 109

Innocence, 223

Inula, 269

Ionidium, 81

Ipecac, American 154

Ipomoea, 368

Iresine, 429

IRIDACEAE, 513

Iris, 513, 735

Ironweed, 238

Iron-wood, 474

Isanthus, 406

Isoetes, 698

Isopyrum, 44

Itea, 174

Iva, 272

Ivy, American, 115 Ground, 416 Poison, 119

Jacob's-ladder, 357

Jamestown-weed, 377

Jatropha, 457

Jeffersonia, 53

Jessamine, Yellow, 345

Jewel-weed, 105

Joe-Pye Weed, 239

Jubula, 706

Judas-tree, 147

JUGLANDACEAE 467

Juglans, 467

JUNCACEAE, 539

Juncus, 540

Juneberry, 166

Jungermannia, _710-712, 714, 715, 717, 718_, 718, _722_

JUNDERMANNIACEAE, 702

Juniperus (Juniper), 494

JUSSIAEA, 187

Kalmia, 310, 319

Kantia, 713

Ketmia, Bladder, 100

King-nut, 468

Kinnikinnik, 214

Knapweed, 297

Knawel, 427

Knotweed, 439

Knotwort Family, 426

Kochia, 431

Koeleria, 659

Kosteletzkya, 100

Krigia, 297

Krynitzkia, 363

Kuhnia, 241

Kyllinga, 573

LABIATAE, 403

Lachnanthes, 512

Lachnocaulon, 567

Lactuca, 303

Lady's-mantle, 161

Lady's-slipper, 510

Lady's-thumb, 441

Lady's-tresses, 501

Lambkill, 319

Lamb's-quarters, 432

Lamium, 420, 734

Lampsana, 297

Laportea, 465

Larch, 492

Larix, 492

Larkspur, 46

Lathyrus, 143

LAURACEAE, 446

Laurel, 319, 321
American, 319
Ground, 315
Mountain, 319

Laurestinus, 217

Lavender, Sea, 327

Lead-plant, 131

Leadwort Family, 327

Leaf-cup, 269

Leather-flower, 36

Leather-leaf, 317

Leatherwood, 448

Leavenworthia, 63

Lechea, 77

Ledum, 321

Leek, Wild, 521

Leersia, 636

LEGUMINOSAE, 122

Leiophyllum, 322

Lejeunea, 707

Lemna, _552_, 552

LEMNACEAE, 551

LENTIBULARIACEAE, 395

Leontodon, 298

Leonuras, 420

Lepachys, 277

Lepidium, 73

Lepidozia, 710

_Lepigonum_, 89

Leptocaulis, 209

Leptochloa, 656, _658_

_Leptopoda_, 287

Lepturus, _655_, 672

Lespedeza, 141

Lesquerella, 68

Lettuce, 303
Lamb, 228
White, 301

_Leucanthemum_, 289

Leucothoe, 317

Lever-wood, 474

Liatris, 242, _243_

Ligusticum, 204

Ligustrum, 337

LILIACEAE, 517

Lilium, 529

Lily, 529
Atamasco, 516
Blackberry, 515
Day, 523
Pond, 56
Water, 55

Lily-of-the-valley, 524

Limnanthemum, 353

Limnobium, 496

Limosella, 384

LINACEAE, 101

Linaria, 379

Linden, 101

Lindera, 447

Ling, 318

Linnaea, 219

Linum, 101

Liochlaena, 718

Lion's-foot, 301

Liparis, 499

Lipocarpha, 584

Lippia, 402

Liquidambar, 179, 180

Liquorice, 137
Wild, 226

Liriodendron, 50

Listera, 501

Lithospermum, 365

Litsea, 447

Littorella, 424

Live-forever, 178

Liver-leaf, 38

Liverworts, 702

Lizard's-tail, 446

LOASACEAE, 193

Lobelia, 305

LOBELIACEAE 305

Loblolly-bay, 96

Locust, 134
Honey, 148
Water, 149

LOGANIACEAE, 345

Loiseleuria, 322

Lolium, 671

Lonicera, 220

Loosestrife, 185, 330
False, 187
Swamp, 186

Lophanthus, 415

Lophiola, 512

Lophocolea, 715

Lopseed, 403

LORANTHACEAE, 449

Lousewort, 392

Lovage, 202

Lucerne, 129

Ludwigia, 187

Lungwort, 363

Lunularia, 730

Lupinus (Lupine), 128

Luzula, 546

Lychnis, 85

Lycium, 376

Lycopsis, 367

LYCOPODIACEAE, 695

Lycopodium, 695

Lycopus, 408

Lygodesmia, 302

Lygodium, 692

Lysimachia, _330_, 330

LYTHRACEAE, 184

Lythrum, 185

Maclura, 464

Madder Family, 222

_Madotheca_, 708, 709

Magnolia, 49

MAGNOLIACEAE, 49

Maianthemum, 526

Maidenhair, 680

Mallow, 97
False, 98
Glade, 98
Indian, 99
Marsh, 97
Rose, 100

Malva, 97

MALVACEAE, 96

Malvastrum, 98

Mamillaria, 197

Mandrake, 53

Man-of-the-earth, 369

Maple, 117
Ash-leaved, 118

Marchantia, 727

MARCHANTIACEAE, 727

Mare's-tail, 182

Marigold, Bur, 284
Fetid, 288
Marsh, 44
Water, 285

Marjoram, Wild, 411

Marrubium, 419

Marshallia, 286

Marsilia, 700

MARSILIACEAE, 700

Marsupella, 721

Martynia, 399

Marvel-of-Peru, 425

_Mastigobryum_, 710

Matricaria, 289

Matrimony-vine, 376

Mayaca, 538

MAYACEAE, 537

May-apple, 53

Mayflower, 315

May-weed, 288

Meadow-beauty, 183

Meadow-sweet, 153

Medeola, 529

Medicago, 129

Medick, 129

Melampyrum, 393

Melanthium, 533

MELASTOMACEAE, 183

Melica, 662, 735

Melilotus (Melilot), 129

Melissa, 412

Melothria, 196

MENISPERMACEAE, 51

Menispermum, 51

Mentha, 407

Mentzelia, 193

Menyanthes, 353

Menziesia, 319

Mercury, Three-seeded, 459

Mermaid-weed, 181

Mertensia, 363

Metzgeria, 724

Mezereum, 448

Mieranthemum, 385

Microstylis, 498

Mignonette, 75

Mikania, 239

Milfoil, 289
Water, 181

Milium, 642

Milkweed, 339
Green, 343

Milkwort, 120

Milkwort, Sea 331

Millet, 642

Mimulus, 382

Mint, 407
Cat, 416
Horse, 413
Mountain, 409
Pepper, 407
Spear, 407

Mirabilis, 425

Mist-flower, 241

Mistletoe, 450
False, 449

Mitchella, 224

Mitella, 171

Mitreola, 346

Mitrewort, 171, 346
False, 171

Moccason-flower, 510

Mocker-nut, 468

Modiola, 100

Mollugo, 198

Monarda, 413

Moneses, 323

Moneywort, 331

Monkey-flower, 382

Monkshood, 46

Monotropa, 325

_Montelia_, 429

Moonseed, 51

Moonwort, 693

Moosewood, 443

Morning-glory, 368

Morus, 464

Moschatel, 216

Moss, Black, or Long, 411
Club, 695, 697
Flowering, 326

Motherwort, 420

Mouse-tail, 40

Mudwort, 384

Mugwort, 291

Muhlenbergia, 643

Mulberry, 464
French, 403

_Mulgedium_, 304,305

Mullein, 379

Munroa, 659

Muscari, 523

Mustard, 72
Hedge, 71, 72
Tansy, 72
Tower, 66
Treacle, 71
Wormseed, 71

Mylia, 717

Myosotis, 364

Myosurus, 40

Myrica, 469

MYRICACEAE, 469

Myriophyllum, 181

Myrtle, Sand, 322
Wax, 469

_Nabalus_, 301, 302

Naiad, 565

NAIADACEAE, 557

Naias, 565

Napaea, 98

Nardia, 721

_Nardosmia_, 292

Narthecium, 532

Nasturtium, 69

Neckweed, 387

Negundo, 118

_Nelumbium_, 55

Nelumbo, 55

Nemastylis, 514

Nemopanthes, 109

Nemophila, 358

Nepeta, 416

_Nesaea_, 186

Nettle, 464
Dead, 420
False, 466
Hedge, 421
Hemp, 421
Horse, 374
Spurge, 457
Wood, 465

Nettle-tree, 463

Nicandra, 376

Nicotiana, 377

Nigella, 48

Nightshade, 373
Enchanter's, 193

Nimble-Will, 644

Ninebark, 153

Nipplewort, 297

Nonesuch, 130

Notholaena, 680

Nothoscordum, 522

Notothylas, 727

Nuphar, 56

NYCTAGINACEAE, 54

Nymphaea, 55

NYMPHAEACEAE, 54

Nyssa, 215

Oak, 475
Jerusalem, 433
Poison, 119

Oakesia, 528

Oat, 653
Sea, 662
Water, 636
Wild, 654

Obolaria, 353

Odontoschisma, 713

OEnothera, 190

Oil-nut, 451

Oldenlandia, 224

OLEACEAE, 335

Oleaster Family, 448

Olive Family, 335

ONAGRACEAE, 186

Onion, 521

Onoclea, 690

Onopordon, 297

Onosmodium, 366

OPHIOGLOSSACEAE, 693

Ophioglossum, 695

Opuntia, 197

Orache, 433

Orange, Mock, 174
Osage, 464

Orange-root, 48

ORCHIDACEAE, 497

Orchis, 498, 506
Crane, fly, 499
Rein, 506
Showy, 506

Origanum, 411

Ornithogalum, 523

OROBANCHACEAE, 393

Orobanche, 395, 734

Orontium, 551

Orpine, 177

Orthocarpus, 391

Oryzopsis, 642

Osier, 480

Osmorrhiza, 210

Osmunda, 692

Ostrya, 474

Oxalis, 105

Ox-eye, 275, 289
Sea, 277

Oxybaphus, 425

Oxydendrum, 316

Oxyria, 437

Oxytropis, 137

Oyster-plant, 298

Pachysandra, 456

Pachystima, 110

Paepalanthus, 567

Painted-cup, 390

Pallavicinia, 723

_Pancratium_, 516

Panicum, 629

Pansy, 81

Papaver, 59

PAPAVERACEAE, 57

Papaw, 50

Pappoose root, 53

_Pardanthus_, 515

Parietaria, 466

Parnassia, 173

Paronychia, 426

Parsley Family, 198

Parsley, Fool's, 205
Hemlock, 202

Parsley-piert, 161

Parsnip, 202
Cow, 202
Meadow, 204
Water, 207

Parthenium, 272

Partridge Berry, 224

Paspalum, 628

Pasque-flower, 37

Passiflora, 194

PASSIFLORACEAE, 194

Passion flower, 194

Pea, Beach, 143
Butterfly, 145
Everlasting, 143
Hoary, 133
Milk, 146
Partridge, 148

Peanut, Hog, 146

Pear, 164
Alligator, 446
Prickly, 197

Pearlwort, 88

Pecan-nut, 468

PEDALIACEAE, 399

Pedicularis, 392

Pellaea, 682

Pellia, 724

Pellitory, 466

Peltandra, 549

Pennycress, 73

Pennyroyal, American, 412
Bastard, 405
False, 406
Mock, 412

Pennywort, Water, 210

Penthorum, 176

Pentstemon, 381

Pepper Family, 446

Pepper, Water, 441

Pepper-bush, 322

Peppergrass, 73

Pepperidge, 215

Peppermint, 407

Pepper-root, 64

Pepperwort, 73

Perilla, 407

Periploca, 339

Persea, 446

Persimmon, 333

Petalostemon, 132

Petasites, 292

_Petroselinum_, 208

Peucedanum, 203

Phacelia, 359

Phalaris, 638

Phaseolus, 144, _145_

Pheasant's-eye, 48

Phegopteris, 686

_Phelipaea_, 395

Philadelphus, 174

Phleum, 644

Phlomis, 420

Phlox, 354

Phoradendron, 449

Phragmites, 658

Phryma, 403

Phyllanthus, 457

_Phyllodice_, 318

Physalis, 375

Physocarpus, 153

Physostegia, 419

Phytolacca, 436

PHYTOLACCACEAE, 435

Picea, 491

Pickerel-weed, 536

Picris, 299

Pigeon berry, 436

Pig nut, 469

Pigweed, 428, 431
Winged, 431

Pilea, 465

Pimpernel, 331
False, 385
Water, 332

Pimpinella, 206

Pine, 490
Ground, 697

Pine-apple, Family, 511

Pine-drops, 325

Pine sap, 325

Pine weed, 95

Pinguicula, 397

Pink, 83, 84
Fire, 84

Pink-root, 346

Pinus, 490, 734

Pinweed, 77

Pinxter flower, 320

PIPERACEAE, 446

Pipe vine, 445

Pipewort, 566
Hairy, 567

Pipsissewa, 322

Pitcher-plant, 57

Plagiochila, 717

Plane-tree Family, 466

Planer-tree, 463

PLANTAGINACEAE, 422

Plantago, 422

Plantain, 422
Indian, 294
Mud, 536
Rattlesnake, 503
Robin's, 266
Water, 554

PLATANACEAE, 466

Platanus, 466

_Pleuranthe_, 718

Pleurisy-root, 340

Pleurogyne, 352

Plucea, 266

Plum, 151
Date, 333

Plum, Ground, 135
Red, 151

PLUMBAGINACEAE, 327

Poa, 663

Podophyllum, 53

PODOSTEMACEAE, 444

Podostemon, 444

Pogonia, 505

Pokeweed, 436

Polanisia, 74

POLEMONIACEAE, 354

Polemonium, 356

Polygala, 120

POLYGALACEAE, 120

POLYGONACEAE, 436

Polygonatum, 524

Polygonella, 443

Polygonum, 439, _443_

Polymnia, 269

Polypodium, 680

Polypody, 680

Polypogon, 648

Polypremum, 345

Polytaenia, 203

Pomme-blanche, 131

Pond spice, 447

Pondweed, 558
Horned, 565

Pontederia, 536

PONTEDERIACEAE, 535

Poplar, 486
White, 50

Poppy, 59
Celandine, 58
Corn, 59
Horn, 58
Mexican, 59
Prickly, 59

Populus, 486

Porella, 708

Portulaca, 90

PORTULACACEAE, 90

Potamogeton, 558

Potato vine, Wild, 369

Potentilla, 158

Poterium, 161

Preissia, 728

Prenanthes, 300

Prim, 337

Primrose, 329
Evening, 190

Primula, 329

PRIMULACEAE, 328

Prince's-feather, 441

Prince's-pine, 323

_Prosartes_, 527

Psilocarya, 577

Psoralea, 130

Ptelea, 107

Pteris, 681

Pterospora, 325

Ptilidium, 709

Puccinellia, 668

Puccoon, 365
Yellow, 48

Pulse, Family, 122

Purslane, 90
Sea, 198
Water, 184, 188

Putty-root, 499

Pycnanthemum, 409

Pyrola, 323

Pyrrhopappus, 303

Pyrularia, 451

Pyrus, 164

Pyxidanthera, 326

Pyxie, 326

_Quamoclit_, 368

Queen-of-the-prairie, 153

Quercus, 475

Quillwort, 698

Radish, 74

Radula, 707

Ragged-Robin, 85

Ragweed, 273

Ragwort, 293

Ramsted, 379

RANUNCULACEAE, 34

Ranunculus, 40

Rape, Broom, 395

Raphanus, 74

Raspberry, 154

Rattlebox, 127

Rattlesnake-master, 211

Rattlesnake-root, 300

Rattlesnake-weed, 299

_Reboulia_, 729

Redbud, 147

Red-root, 112, 512

Redtop, 647
False, 665
Tall, 667

Reed, 658
Bur, 547

Reseda, 75

RESEDACEAE, 75

RHAMNACEAE, 111

Rhamnus, 111

Rheumatism-root, 53

Rhexia, 183

Rhinanthus, 392

Rhododendron, 320

_Rhodora_, 321

Rhus, 118

Rhynchosia, 147

Rhynchospora, _577_, 584

Ribes, 174

Ribgrass, 423

Ribwort, 422

Riccia, 730

RICCIACEAE, 730

Rice, Indian, 635
Water, 635

Richweed, 407, 465

Ricinus, 460

Riverweed, 444

Robinia, 134

Rocket, 71
Dyer's, 75
Sea, 74
Yellow, 70

Rock-rose, 76

Rosa, 162

ROSACEAE, 150

Rose, 162
Cotton, 267
Guelder, 218
Rock, 76

Rosebay, 320

Rosemary, Marsh, 327

Rosin-weed, 270

Rotala, 184

Rottboellia, 636

Roubieva, 433

RUBIACEAE, 222

Rubus, 154

Rudbeckia, 276

Rue Family, 106

Rue, Meadow, 39

Ruellia, 400

Rumex, 437

Ruppia, 564

Rush, 540

Rush, Bald, 577
Bog, 540
Club, 578
Horned, 586
Nut, 586
Scouring, 676
Spike, 573
Twig, 586
Wood, 546

RUTACEAE, 106

Rye, Wild, 673

Sabbatia, 347

Sage, 412
Jerusalem, 420
Wood, 406

Sagina, 88

Sagittaria, 554, 735

St. Andrew's-cross, 92

St. John's-wort, 92
Marsh, 95

St. Peter's-wort, 92

SALICACEAE, 480

Salicornia, 434

Salix, 480

Salmon-berry, 154

Salsify, 298

Salsola, 435, 734

Saltwort, 435

Salvia, 412

Salvinia, 701

SALVINIACEAE, 701

Sambucus, 217

Samolus, 332

Samphire, 434

Sandal-wood Family, 450

Sandweed, Sea, 651

Sandwort, 85

Sanguinaria, 58

Sanicula (Sanicle), 212

SANTALACEAE, 450

SAPINDACEAE, 115

Sapindus, 116

Sapodilla Family, 332

Saponaria, 83

SAPOTACEAE, 332

_Sarcoscyphus_, 721

Sarracenia, 57

SARRACENIACEAE, 57

Sarsaparilla, 212, 213

Sassafras, 447

Satureia, 411

Saururus, 446

Savin, 494

Savory, 411

Saxifraga, 169

SAXIFRAGACEAE, 168

Saxifrage, 169
Golden, 172

Scabiosa (Scabious), 229, 733

Scale-mosses, 702

Scapania, 713

Schedonnardus, 655

Scheuchzeria, 558

Schizaea, 690

_Schollera_, 536

Schrankia, 149

Schwalbea, 391

Schweinitzia, 325

_Scilla_, 523

Scirpus, _576_, 578, _582_

Scleranthus, 427

Scleria, 586

Sclerolepis, 238

Scolochloa, 666

Scolopendrium, 685

Scrophularia, 380

SCROPHULARIACEAE, 377

Scutellaria, 416

Sedge, 587

Sedge Family, 567

Sedum, 177

Seed-box, 187

Selaginella, 697

SELAGINELLACEAE, 697

Selenia, 63

Self-heal, 418

_Sendtnera_, 710

Senebiera, 74

Senecio, 292

Senna, 147

Sensitive-brier, 149

Sensitive-plant, Wild, 148

Sericocarpus, 254

Service-berry, 166

Sesuvium, 198

Setaria, 634

Seymeria, 388

Shad-bush, 166

Sheep-berry, 219

Shepherdia, 449

Shepherd's-purse, 73

Sherardia, 227

Shin-leaf, 323

Shooting-star, 329

Sibbaldia, 161

Sickle-pod, 66

Sicyos, 195

Sida, 99

Side-saddle Flower, 57

Silene, 83

Silkweed, 339

Silphium, 270

Silver-bell Tree, 334

Silver-berry, 449

Silver-weed, 160

_Sinapis_, 72

Sisymbrium, 71

Sisyrinchium, 515, 735

Sium, 207, _207_

Skullcap, 416

Skunk-cabbage, 550

Sloe, 152

Smartweed, 441

Smilacina, 525, _526_

Smilax, 519

Snake-head, 381

Snake-root, 47
Black, 212
Button, 211, 242
Seneca, 120
Virginia, 445
White, 241

Snapdragon, 380

Sneezeweed, 287

Sneezewort, 289

Snowball-tree, 218

Snowberry, 220
Creeping, 314

Snowdrop, 334

Soapberry, 116

Soapwort, 83

SOLANACEAE, 373

Solanum, 373

Solea, 81

Solidago, 246
_altissima_, 249
arguta, 250, _250_
bicolor, 247
Bigelovii, 247
Boottii, 250
caesia, 247
Canadensis, 251
Curtisii, 247
Drummondii, 252
Elliottii, 250
_elliptica_, 250
_gigantea_, 251
Houghtonii, 252
humilis, 248
juncea, 250
lanceolata, 252
latifolia, 247
Lindheimeriana, 247
_linoides_, 250
macrophylla, 247
Missouriensis, 251
monticola, 247
_Muhlenbergii_, 250
neglecta, 250
nemoralis, 251
odora, 249
Ohioensis, 252
patula, 249
petiolaris, 246
pilosa, 249
puberula, 248
radula, 251
Riddellii, 252
rigida, 252
rugosa, 249
rupestris, 251
sempervirens, 248
serotina, 251, _251_
Shortii, 251
speciosa, 249
squarrosa, 246
stricta, 248, _249_
tenuifolia, 252
_thyrsoidea_, 248
tortifolia, 249
uliginosa, 249
ulmifolia, 250
virgata, 248
Virgaurea, 248

Solomon's-seal, 524
False, 525

Sonchus, 305

Sophora, 127

Sorrel, 437
Mountain, 437
Wood, 105

Sorrel-tree, 316

Sour-gum, 215

Sour-wood, 316

Spanish-bayonet, 524

Spanish-needles, 285

Sparganium, 547

Spartina, 627

Spatter-dock, 56

Spearmint, 407

Spearwort, 41

Specularia, 308

Speedwell, 386

Spergula, 90

_Spergularia_, 89

Spermacoce, 225

Sphaeralcea, 99

Sphaerocarpus, 732

_Sphagnoecetis_, 713

Spice-bush, 447

Spiderwort, 539

Spigelia, 346

Spikenard, 213
False, 525

Spindle-tree, 110

Spiraea, 153, _153_

Spiranthes, 501

Spirodela, 552

Spleenwort, 683

Spoonwood, 319

Sporobolus, 645

Spring-beauty, 91

Spruce, 491

Spurge, 452

Spurrey, 90
Sand, 89

Squaw-root, 394

Squaw-weed, 293

Squirrel-corn, 60

Stachys, 421

Staff-tree, 110

Stagger-bush, 316

Staphylea, 118

Star-flower, 329

Star-grass, 512, 516

Star-of-Bethlehem, 523

Starwort, 86, 255
Water, 182

Statice, 327

Steeple-bush, 153

_Steetzia_, 724

Steironema, 330

Stellaria, 86, 733

Stenanthium, 534

Stenosiphon, 193

Stickseed, 362

Sticktight, 284

Stillingia, 460

Stipa, 641

Stitchwort, 87

Stonecrop, 177
Ditch, 176

Stone-root, 407

Storax, 333

Storksbill, 104

Stramonium, 377

Strawberry, 158
Barren, 158

Strawberry-bush, 110

Streptopus, 526

Strophostyles, 145

_Struthiopteris_, 690

Stuartia, 96

Stylophorum, 58

Stylosanthes, 142

STYRACACEAE, 333

Styrax, 334

Suaeda, 434

Subularia, 69

Succory, 298

Sugar-berry, 463

Sullivantia, 171

Sumach, 118

Sundew, 178

Sunflower, 277

Supple-Jack, 111

Sweetbrier, 164

Sweet-cicely, 210

Sweet-flag, 551

Sweet-gale, 469

Sweet-gum, 180

Sweet-leaf, 334

Sweet-scented shrub, 167

Sweet William, 83
Wild, 354

Sycamore, 466

Symphoricarpos, 220

Symphytum, 367

Symplocarpus, 550

Symplocos, 334

Synandra, 419

Synthyris, 386

Syringa, 174

Tacamahac, 487

Talinum, 91, 733

Tamarack, 493

Tanacetum, 290

Tansy, 290

Taraxacum, 303

Tare, 142

Taxodium, 493

Taxus, 494

Tea-berry, 316

Tea Family, 95

Tea, Labrador, 321
Mexican, 433
New, Jersey, 112
Oswego, 414

Tear-thumb, 442

Teasel, 229

Tecoma, 398

Tephrosia, 133

TERNSTROEMIACEAE, 95

Tetragonotheca, 274

_Tetranthera_, 447

Teucrium, 406

Thalictrum, 39, 39

Thaspium, 204, _208_

Thelesperma, 285

Thelypodium, 72

Thermopsis, 126

Thimbleberry, 155

Thistle, 295
Canada, 296
Cotton, 297
Plumeless, 296
Scotch, 297
Sow, 305
Star, 297

Thlaspi, 73

Thorn, 165
Black, 152
White, 165

Thoroughwax, 206

Thoroughwort, 239

Thuya, 493

Thyme, 411
Basil, 411
Creeping, 411

THYMELAEACEAE, 448

Thymus, 411

Tiarella, 171

Tickseed, 281

Tiedemannia, 202

Tilia, 101

TILIACEAE, 101

Tillaea, 177

Tillandsia, 511

Timothy, 645

Tinker's-weed, 291

Tipularia, 499

_Tissa_, 89

Toadflax, 379
Bastard, 450

Tobacco, 377
Indian, 307

Tofieldia, 532

Toothache-tree, 106

Toothwort, 64

Touch-me-not, 106

Townsendia, 254

Trachelospermum, 338

Tradescantia, 539

Tragia, 460

Tragopogon, 298

Trantvetteria, 39

Tread-softly, 457

Tree-of-heaven, 107

Trefoil, 128
Shrubby, 107
Tick, 138

Trichocolea, 709

Trichomanes, 692

Trichostema, 405

_Tricuspis_, 657, 658

Trientalis, 329

Trifolium, 128

Triglochin, 557

Trilisa, 243

Trillium, 530

Triodia, 657

Triosteum, 219

Tripsacum, 636

Trisetum, 653, 735

_Triticum_, 671, 672

Trollius, 45

Troximon, 302

Trumpet-creeper, 398

Trumpet-flower, 398

Trumpets, 57

Trumpet-weed, 239

Tsuga, 492

Tulip-tree, 50

Tumbleweed, 428

Tupelo, 215

Turnip, Indian, 549

Turnsole, 361

Turtlehead, 381

Tussilago, 291

Twayblade, 499, 501

Twin-flower, 219

Twin-leaf, 53

Twisted-stalk, 526

Typha, 547

TYPHACLAE, 547

Ulmus, 462

UMBELLIFERAE, 198

Umbrella-leaf, 53

Umbrella-tree, 49, 50

Unicorn-plant, 399

Uniola, 662

Urtica, 464

URTICACEAE, 461

Utricularia, 395

Uvularia, 527, _528_

_Vaccaria_, 83

Vaccinium, 312

Valeriana (Valerian), 228
Greek, 356

VALERIANACEAE, 228

Valerianella, 228

Vallisneria, 496

Vanilla-plant, 243

Velvet-leaf, 99

Venus's Fly-trap, 179
Looking-glass, 308

Veratrum, _533_, 533

Verbascum, 379

Verbena, 401

VERBENACEAE, 401

Verbesina, 280

Vernonia, 238

Veronica, 386

Vervain, 401

_Vesicaria_, 69

Vetch, 142
Joint, Sensitive, 137
Milk, 134

Vetchling, 143

Viburnum, 217

Vicia, 142

_Vilfa_, 645, 646

Vincetoxicum, 344

Vine Family, 112

Viola, 78

VIOLACEAE, 78

Violet, 78

Violet, Dame's, 71
Dog's-tooth, 528
Green, 81
Water, 328

Virginian-creeper, 115

Virgin's-bower, 35

VITACEAE, 112

Vitis, 113, 114

Waahoo, 110

Wake-robin, 530

Waldsteinia, 157

Walking-leaf, 685

Wallflower, Western, 71

Walnut, 467

Watercress, 69

Waterleaf, 357

Water-nymph, 55

Water-shield, 55

Waterweed, 495

Waterwort, 91

Wax work, 110

Wayfaring-tree, 217

Weigela, 222

Weld, 75

Wheat, Cow, 393
India, 443

Whin, 127

Whiteweed, 289

Whitlow-wort, 426

Wicky, 319

Willow, 480

Willow-herb, 188

Wind-flower, 36, 38

Winterberry, 109

Wintergreen, 315, 323
Aromatic, 315
Chickweed, 329
Creeping, 315
Spotted, 313

Wistaria, 134

Witch hazel, 179

Wolf berry, 220

Wolfsbane, 46

Woodbine, 115, 220

Woodsia, 690

Woodwardia, 683

Wood-waxen, 127

Wormseed, 434

Wormwood, 289
Roman, 273

Xanthium, 274

Xanthorrhiza, 48

_Xanthosoma_, 550

Xanthoxylum, 106

Xerophyllum, 532

XYRIDACEAE, 536

Xyris, 537

Yam, 517

Yarrow, 289

Yaupon, 108

Yellow-eyed, Grass, 537

Yellow-rattle, 392

Yellow-root, 48

Yellow-wood, 126

Yew, 494

Yucca, 524

Zannichellia, 565

Zephyranthes, 516, 735

Zizania, 635

Zizia, _206_, 207

Zostera, 565

Zygadenus, 534

PLATES

WITH EXPLANATIONS.

EXPLANATION OF PLATE I.

CYPERUS.--(1) Small plant of C. diandrus; (2) a spikelet magnified; (3) a piece of the rhachis with one scale enclosing its flower; (4) a separate flower more magnified.--(5) C. erythrorhizos, a spikelet magnified; the lower scales and flowers have fallen, showing the small internal scales of the section Papyrus, formed of the winged margins of the joints of the rhachis detached; (6) a separate one, more enlarged; (7) a flower; (8) an achene, cut in two.--(9) C. dentatus, a piece of the rhachis of a spike with the lower part of one scale, showing how it is decurrent on the joint beneath (cut across) to form scale-like wings.

DULICHIUM.--(1) Upper part of a plant of D. spathaceum; (2) part of a spikelet somewhat enlarged; (3) piece of rhachis, and one scale decurrent on the joint beneath; (4) magnified flower.

KYLLINGA.--(1) Plant of K. pumila; (2) one-flowered spikelet on a piece of the rhachis, enlarged; (3) the same, more enlarged and open; (4) achene; and (5) section of same magnified.

EXPLANATION OF PLATE II.

HEMICARPHA.--(1) Plant of H. subsquarrosa, natural size; (2) a spikelet enlarged, with its bract; (3) magnified scale of the same; (5) a flower, with its single stamen and minute internal scale, magnified; (6) achene, magnified.

LIPOCARPHA.--(1) Upper part of plants of L. maculata, with spikelets; (2) diagram of a flower, representing the ovary between the two internal scales, a single stamen, the scale of the spikelet on one side, and the axis of the spikelet on the other; (3) scale of spikelet detached; (4) a flower with its two inner scales; (5) achene, magnified.

FUIRENA.--(1) Upper portion of plant of F. squarrosa, var. pumila; (2) scale of spike enclosing a flower; (3) open scale of same; (4) flower; (5) one of the scales and one of the bristles of the perianth; (6) achene, and (7) section of same.

EXPLANATION OF PLATE III.

ELEOCHARIS.--(1) Small plant of E. olivacea; (2) the spikelet enlarged; (3) detached scale; (4) flower; (5) achene and bristles.--(6) E. quadrangulata, spikelet; (7) a scale; (8) flower; (9) achene and bristles.--(10) E. tuberculosa; the achene with its great tubercle, and bristles.

SCIRPUS.--(1) Summit of plant of small S. debilis; (2) a spikelet; (3) a scale of the same, and (4) flower; (5) achene with its bristles.

ERIOPHORUM.--(1) Small plant of E. alpinum, in flower; (2) spikelet; (3) a scale, and (4) a flower from the same; (5) the spikelet, in fruit, the bristles forming a cottony tuft; (6) achene and its bristles.--(6, under _Scirpus_) a small portion of the inflorescence of E. cyperinum; (7) a flower; (8) a spikelet in fruit; (9) achene from the same, with the tortuous bristles; (10) section of the achene.

FIMBRISTYLIS.--(1) Summit of a small flowering stem of F. laxa; (2) a spikelet of the same; (3) a detached scale, and (4) a flower of the same; (5) achene.--F. autumnalis, (6), a spikelet, enlarged; (7) flower; (8) achene, and (9) section of the same.

EXPLANATION OF PLATE IV.

DICHROMENA.--(1) Head and involucre of D. latifolia; (2) a scale from one of the spikelets, and (3) the same cut across; (4) a flower; (5) achene with its tubercle.

PSILOCARYA.--(1) Part of plant, (2) enlarged spikelet, (3) detached scale, (4) flower, and (5) achene with its beak, of P. scirpoides.

RHYNCHOSPORA.--(1) Upper part of flowering stem of R. Torreyana; (2) a spikelet; (3) detached flower; (4) achene, with short bristles at its base; (5) one of these bristles more magnified.

R. (Sec. CERATOSCHOENUS).--(1) Upper part of fruiting plant, (2) detached spikelet, (3) flower, and (4) beaked achene, with its bristles, of R. macrostachya.

EXPLANATION OF PLATE V.

CLADIUM.--(1) Summit of a plant of C. mariscoides; (2) detached spikelet; (3) same, open, showing a staminate and a perfect flower; (4) the nut-like achene, and (5) the longitudinal section of the same.

SCLERIA.--(6) Summit of a flowering stem of S. reticularis; (7) three spikelets from a cluster, the middle one pistillate, the lateral ones staminate; (8) staminate spikelet displaying four male flowers, the filaments of two of them having lost their anthers; (9) pistillate spikelet displaying a single pistillate flower; (10) achene with the 3-lobed double cup underneath.

CAREX.--(11) Plant of C. pauciflora; (12) a staminate flower with its scale; (13) scale, and (14) mature pistillate flower, in its perigynium; (15) cross section of perigynium and of the contained achene; (16) achene on its stalk, style and stigmas.--(17) C. Jamesii, upper part of flowering plant; (18) the spike enlarged; (19) a staminate flower and its scale; (20) pistillate flower in its perigynium; (21) the same with half the perigynium cut away to show the contained achene and style.

EXPLANATION OF PLATE VI.

CAREX.--(1) C. trisperma, upper part of a stem in fruit; (2) enlarged spike displayed, with three staminate and two pistillate flowers; (3) a scale, and (4) a ripe perigynium, of the latter; with (5) a section of the perigynium near the base, and of the contained achene.--(6) C. straminea, var. brevior, summit of a fruiting plant; (7) a spike enlarged; (8) scale of a pistillate flower; (9) the winged perigynium and the contained achene cut across; (10) detached achene with persistent style and stigmas.--(11) C. umbellata, whole plant; (12) a perigynium and its scale; (13) cross-section toward the base of perigynium and its contained achene; (14) detached achene with its persistent style and stigmas.--C. bullata; (15) upper part of plant in fruit, with one pistillate and two staminate spikes; (16) one of its staminate flowers with the scale; (17) a pistillate scale, and (18) mature perigynium; (19) longitudinal section of the latter, showing the achene and its style, and (20) cross-section of the same.

EXPLANATION OF PLATE VII.

LEERSIA.--(1) Panicle of L. oryzoides, reduced in size; (2) a branchlet of the same, with its spikelets, of the natural size; and (3) an open spikelet in flower, enlarged.

ZIZANIA.--(1) A staminate, and (2) a pistillate flower or spikelet of Z. aquatica; (3) a magnified pistil with a pair of squamulae or hypogynous scales; (4) a grain, and a magnified longitudinal section of the lower part of the same, showing the embryo at the outside of the base of the albumen.

ALOPECURUS.--(1) Part of a plant of A. geniculatus, in flower; (2) a few spikelets from the spike-like inflorescence, moderately magnified; (3) an open spikelet in flower, more magnified, and (4) the single flowering glume detached.

PHLEUM.--A detached spikelet of P. pratense, having the flower with its glume and palet raised above the empty glumes, magnified.

HELEOCHLOA.--(1) Inflorescence of H. schoenoides; (2) a separate enlarged spikelet; and (3) the same open, in flower.

SPOROBOLUS.--(1) A spikelet of S. cryptandrus, magnified; (2) the same, with the flower open, raised above the empty glumes; and (3) the fruit, more magnified, showing the seed loose in the pericarp (utricle).--(4) An enlarged spikelet of E. vaginaeflora; and (5) the same displayed.

AGROSTIS.--(1) Panicle of A. alba, var. vulgaris, with (2) an enlarged open spikelet of the same; also (3) the rough pedicel and glumes of A. scabra, with the flower separated, the latter having no palet.

EXPLANATION OF PLATE VIII.

POLYPOGON.--(1) Spike-like contracted panicle of P. Monspeliensis; (2) an enlarged detached spikelet, showing the long awns to the empty glumes; (3) the same open in flower; and (4) a separate flower without the empty glumes.

CINNA.--(1) A magnified spikelet of C. arundinacea; and (2) the same open, displaying the flowering glume and palet, the single stamen, and the pistil.

MUHLENBERGIA.--(1) A magnified closed spikelet of M. sylvatica; (2) the same with the open flower raised out of the empty glumes.--(3) A magnified spikelet of M. diffusa; (4) its minute and unequal empty glumes more magnified; and (5) an open spikelet of the same.

BRACHYELYTRUM.--(1) A spikelet of B. aristatum enlarged; (2) the same displayed.

CALAMAGROSTIS.--(1) An open spikelet of C. Canadensis, enlarged, displaying all the parts; (2) the same with the flower raised out of the empty glumes, showing the hairy rudiment behind the palet.

ORYZOPSIS.--(1) An open magnified spikelet of O. asperifolia; and (2) the flower of the same removed from the empty glumes. Notice the remarkably long squamulae or hypogynous scales, which here nearly equal the glume in length.

STIPA.--Empty glumes and flower (a little separated) of S. avenacea, enlarged.

ARISTIDA.--A spikelet of A. purpurascens, enlarged.

EXPLANATION OF PLATE IX.

SPARTINA.--(1) Portion of the inflorescence of S. stricta, of the natural size; (2) a spikelet enlarged; and (3) the same displaced, the flower raised above the empty glumes.

CTENIUM.--(1) Spike of C. Americanum; (2) a single spikelet magnified; and (3) the same displayed, the empty glumes separated.

BOUTELOUA.--(1) A portion of the compound spike of B. racemosa, of the natural size; and (2) a spikelet displayed and magnified, the flowers raised out of the empty glumes.

GYMNOPOGON.--(1) Inflorescence of G. racemosus, reduced in size; and (2) a magnified spikelet with the parts displayed.

CYNODON.--(1) Inflorescence of C. Dactylon, of digitate spikes; (2) a spikelet magnified and displayed, showing a perfect flower and a rudiment.

ELEUSINE.--(1) One of the spikes from the digitate inflorescence of E. Indica; (2) a magnified spikelet; (3) the same with the flowers more displayed; (4) a flower from the last, showing its parts; (5) the fruit magnified, showing the seed loose in the utricle; and (6) the wrinkled seed detached.--(1, under _Dactyloctenium_) Inflorescence of E. AEgyptiaca, of digitate spikes; (2) one of the spikelets magnified; (3) the fruit magnified, showing the seed loose in the thin pericarp (utricle); and (4) the wrinkled seed more magnified.

DIPLACHNE.--(1) Small portion of the inflorescence of D. fascicularis; (2) one of its spikelets displayed and magnified; (3) an open flower of the same.

EXPLANATION OF PLATE X.

TRIODIA.--(1) Magnified spikelet of T. seslerioides; (2) the same displayed and the lowest flower open; (3) back view of the flowering glume spread out.

GRAPHEPHORUM.--(1) A magnified spikelet of G. melicoides, displayed; (2) a part of the hairy rhachis and one flower of the same.

DIARRHENA.--(1) A spikelet of D. Americana, enlarged; (2) the grain in its glume and palet.

DACTYLIS.--A spikelet of D. glomerata magnified and displayed.

KOELERIA.--(1) A magnified spikelet of K. cristata, expanded, showing the empty glumes, the three flowers, and a rudiment; (2) lower half of a flowering glume, partly spread open; it is much more folded and keeled in its natural condition.

EATONIA.--A magnified spikelet of E. obtusata, expanded, showing the empty glumes, the two flowers, and a rudiment.

MELICA.--A magnified spikelet of M. mutica, expanded, showing the empty glumes, two perfect flowers, and an abortive one.

GLYCERIA.--(1) A magnified spikelet of G. nervata; (2) a separate flower with one joint of the rhachis; and (3) the lower half of a flowering glume, showing its form (rounded on the back, not keeled).

DISTICHLIS--(1) A pistillate spikelet of D. maritima, enlarged; (2) a flower from the same; and (3) a flower from a staminate spikelet.

POA.--(1) Panicle of P. compressa, reduced in size; (2) a magnified spikelet; (3) a separate flower more magnified; (4) a flowering glume cut across and somewhat outspread.

ERAGROSTIS.--(1) A spikelet of E. pilosa, enlarged; (2) the same, from which the glumes and all of six lower flowers except the palets have fallen away; (3) a magnified flower, open; (4) the flowering glume of the same outspread.

BRIZA.--(1) A spikelet of B. media, enlarged; (2) a separate flower.

FESTUCA.--(1) A spikelet of F. elatior, enlarged; (2) a separate flower; (3) lower part of a flowering glume, outspread.

BROMUS.--(1) A spikelet of B. secalinus, or Chess; and (2) a separate flower, enlarged.

EXPLANATION OF PLATE XI.

UNIOLA.--(1) A spikelet of U. latifolia, of about the natural size; (2) a flower, enlarged; (3) empty flowering glume of the lowest (sterile) flower.

PHRAGMITES--(1) A spikelet of P. communis, enlarged; (2) one of the perfect flowers, enlarged; and (3) the lowest flower, which has stamens only.

ARUNDINARIA.--(1) A spikelet of A. macrosperma; and (2) a separate flower, magnified.

SCHEDONNARDUS.--(1) Portion of the spike of S. Texanus, enlarged; and (2) a flower, magnified.

LOLIUM.--(1) Portion of the spike of L. temulentum; and (2) a separate flower, magnified.

AGROPYRUM.--(1) Portion of the spike of A. repens, or Couch-Grass, of about the natural size; (2) a flower, magnified.

HORDEUM.--(1) The three one flowered spikelets from one joint of the spike of H. jubatum, with their awn-like empty glumes, the lateral flowers abortive and neutral, the middle one alone perfect; (2) this perfect flower (with an awn-like rudiment) open and enlarged.

ELYMUS.--(1) The two spikelets of one joint of the spike of E. Virginicus, about the natural size; (2) the empty glumes and the flowers of one spikelet, enlarged and displayed; and (3) an open flower, more magnified.

GYMNOSTICHUM.--(1) A spikelet of G. Hystrix; and (2) an expanded flower, magnified.

ASPRELLA.--(1) A spikelet of A. Hystrix; and (2) an expanded flower, magnified.

EXPLANATION OF PLATE XII.

DESCHAMPSIA.--(1) Panicle of D. flexuosa; (2) a spikelet, magnified, the parts displayed; and (3) one of the flowers detached and open.

DANTRONIA.--(1) Panicle of D. spicata; (2) a spikelet enlarged; and (3) a separate flower from the same.

TRISETUM.--(1) A spikelet of T. subspicatum, var. molle, expanded and magnified; and (2) a separate open flower.

AVENA.--(1) A spikelet of A. striata, displayed and magnified; and (2) a separate flower.

ARRHENATHERUM.--A spikelet of A. avenaceum, displayed and magnified; (1) the empty glumes; (2) the flowers, the lower one staminate only, the next perfect, and the third a rudiment.

HOLCUS.--(1) A spikelet of H. lanatus, magnified; (2) the same displayed to show the two flowers, the lower perfect and awnless, the upper staminate and awned.

EXPLANATION OF PLATE XIII.

HIEROCHLOA.--(1) A spikelet of H. borealis, enlarged; (2) the same displayed, the flowers separated from the empty glumes, the two lateral ones with 3 stamens and no pistil, the middle or terminal one with a pistil and only 2 stamens.

ANTHOXANTHUM--(1) The spike-like inflorescence of A. odoratum; (2) a spikelet magnified; (3) another with the parts displayed, the flowers raised from the lower empty glumes, the lateral glumes empty and awned, the terminal flower perfect and diandrous.

PHALARIS.--(1) A spikelet of P. arundinacea, enlarged, (2) the empty glumes, and a perfect flower with a hairy rudiment on each side of it.

MILIUM.--(1) Portion of the panicle of M. effusum; (2) a closed spikelet, magnified; and (3) the same displayed.

AMPHICARPUM.--(1) A spikelet from the panicle of A. Purshii, magnified; (2) the same, with the parts displayed; and (3) a radical (fertile) spikelet, enlarged.

PASPALUM.--(1) Inflorescence of P. laeve; (2) a closed spikelet, enlarged; (3) the same with the parts displayed.

PANICUM.--(1) Part of a spike of P. sanguinale; (2) one of its spikelets, magnified; (3) the same with its parts displayed, the three lower glumes empty.--(4) A spikelet of P. capillare, magnified; (5) the same displayed, the three lower glumes empty.--(6) A spikelet of P. clandestinum, magnified, (7) the same displayed, the lower flower represented by a glume and palet only.--(8) A spikelet of P. virgatum, magnified; (9) the same displayed, the lower flower staminate.

SETARIA.--(1) A magnified spikelet of S. glauca, with the accompanying cluster of bristles, (2) the spikelet displayed, showing the neutral lower flower, of a glume and palet only, and the perfect flower.

EXPLANATION OF PLATE XIV.

CENCHRUS.--(1) Involucre of C. tribuloides, in flower, enlarged; (2) longitudinal section of the same; (3) a spikelet displayed (the stigmas should belong to the right-hand flower; the left-hand or lower flower is only staminate).

TRIPSACUM.--(1) Piece of the spike (of the natural size), pistillate below, staminate above; (2) a longitudinal section of one of the pistillate spikelets; (3) a pistillate spikelet with its parts displayed; (4) a staminate (two-flowered) spikelet, with its parts displayed.

ERIANTHUS.--(1) Part of the hairy inflorescence with two spikelets of E. saccharoides, enlarged; (2) one of the spikelets displayed.

ANDROPOGON.--(1) Small portion of the spike of A. furcatus, enlarged, with one fertile and awned spikelet, and one staminate and awnless spikelet; (2) the fertile spikelet, and (3) the staminate spikelet, displayed.

CHRYSOPOGON.--(1) A fertile spikelet of C. nutans, enlarged, with a sterile pedicel on each side; (2) the spikelet displayed.

EXPLANATION OF PLATE XV.

BECKMANNIA.--(1) Inflorescence of B. erucaeformis, var., reduced in size; (2) a spike, enlarged; (3) a spikelet, and (4) the same opened; (5) the flower.

ERIOCHLOA.--(1) Inflorescence of E. polystachya, reduced; (2) a spikelet, enlarged, and (3) the same opened; (4) the flower opened.

ROTTBOELLIA.--(1) Portion of the spike of R. rugosa, somewhat reduced, and (2) a portion enlarged, with (3) the fertile spikelet and (4) the pedicelled sterile spikelet of the middle joint displaced; (5) the fertile spikelet opened; (6) the third empty glume, and (7) the flower.

AMMOPHILA.--(1) Inflorescence of A. arundinacea, reduced; (2) a spikelet, enlarged, and (3) the flower, with a hairy rudiment at the base of the palet.

LEPTOCHLOA.--(1) Inflorescence of L. mucronata, reduced; (2) portion of rhachis of a spike, bearing two spikelets; (3) a 3-flowered spikelet; and (4) a flower removed.

BUCHLOE.--(1) Staminate and (2) pistillate inflorescence of B. dactyloides; (3) a staminate spikelet, and (4) one of its flowers removed; (5) a pistil late spikelet, enlarged; (6) vertical section of same; and (7) the outer empty glume removed.

MUNROA.--(1) Inflorescence of M. squarrosa; (2) a spikelet, enlarged; and (3) a flower, opened.

SCOLOCHLOA.--(1) Inflorescence of S. festucacea, reduced; (2) a spikelet, enlarged; and (3) a flower.

PUCCINELLIA.--(1) Inflorescence of P. maritima, reduced; (2) a spikelet, enlarged; and (3) a flower.

EXPLANATION OF PLATE XVI.

POLYPODIUM.--Plant of P. vulgare; piece of the frond; a magnified sporangium with its stalk, and another bursting and discharging spores.

ONOCLEA.--(1) Pinna of the sterile frond of O. Struthiopteris; (2) portion of a fertile frond; (3) a piece of one pinna cut off to show the manner in which it is rolled up; and (4) a portion of the last, magnified, with one side unrolled; toward the base the sporangia all removed, to show how the fruit-dots are borne each on the middle of a vein.

PELLAEA.--Sterile and fertile plants of P. gracilis, and (1) a portion of the fertile frond enlarged, with a piece of the marginal indusium turned back to display the fruit; the sporangia are all removed from the fruit-bearing tips of the two forks of the lower vein.

EXPLANATION OF PLATE XVII.

PTERIS.--A pinnule of P. aquilina, and (2) a piece of one of the lobes, enlarged, the marginal indusium rolled back on one side, displaying the fruit; the sporangia all removed from the lower part to show the receptacle that bears them, viz. a cross-line connecting the tips of the veins.

ADIANTUM.--(1) Piece of the frond of A. pedatum; (2) a pinnule somewhat enlarged; and (3) a piece of one more enlarged, with the indusium of one fruit dot turned back to show the attachment of the fruit.

CHEILANTHES.--(1) Small plant of C. vestita; and (2) a fruit-bearing pinnule, enlarged.

WOODWARDIA.--(1) Portion of the sterile and (2) of the fertile frond of W. augustifolia; (3) a piece of the latter, enlarged; (4) piece of the frond of W. Virginica; and (5) part of a fruiting lobe, enlarged.

EXPLANATION OF PLATE XVIII.

CAMPTOSORUS.--Plant of C. rhizophyllus, and (1) a portion of a frond, with fruit dots, enlarged.

SCOLOPENDRIUM.--Tip of a fertile frond of S. vulgare, and (2) a piece enlarged, with two fruit-dots.

ASPLENIUM.--(1) A pinna of A. thelypteroides; and (2) part of a lobe in fruit, enlarged.

DICKSONIA.--(1) Pinna of D. pilosiuscula; (2) portion of a pinnule, enlarged; and (3) a fruit-dot in its cup shaped indusium.

EXPLANATION OF PLATE XIX.

CYSTOPTERIS.--(1) Piece of the frond of C. bulbifera; (2) a lobe in fruit, enlarged; and (3) a small portion more magnified, bearing a fruit-dot with its indusium thrown back.

WOODSIA.--(1) Small frond of W. glabella; (2) a part of a fruiting pinna of the same, magnified; and (3) a separate indusium, more magnified; (4) a piece of a fruitful pinnule of W. obtusa, enlarged; and (5) a fruit with the opened indusium beneath, more magnified.

ASPIDIUM.--(1) Pinna of A. (Dryopteris) marginale; and (2) a magnified fruiting portion; (3) piece of A. (Polystichum) acrostichoides; and (4) a small fruiting portion, magnified.

ONOCLEA.--Sterile and fertile frond of O. sensibilis; (1) front view of a fruiting contracted pinnule, enlarged; and (2) the same laid open and viewed from the other side; on one lobe the sporangia are removed from the veins.

EXPLANATION OF PLATE XIX.

CYSTOPTERIS.--(1) Piece of the frond of C. bulbifera; (2) a lobe in fruit, enlarged; and (3) a small portion more magnified, bearing a fruit-dot with its indusium thrown back.

WOODSIA.--(1) Small frond of W. glabella; (2) a part of a fruiting pinna of the same, magnified; and (3) a separate indusium, more magnified; (4) a piece of a fruitful pinnule of W. obtusa, enlarged; and (5) a fruit with the opened indusium beneath, more magnified.

ASPIDIUM.--(1) Pinna of A. (Dryopteris) marginale; and (2) a magnified fruiting portion; (3) piece of A. (Polystichum) acrostichoides; and (4) a small fruiting portion, magnified.

ONOCLEA.--Sterile and fertile frond of O. sensibilis; (1) front view of a fruiting contracted pinnule, enlarged; and (2) the same laid open and viewed from the other side; on one lobe the sporangia are removed from the veins.

EXPLANATION OF PLATE XX.

SCHIZAEA.--Plant of S. pusilla, of the natural size; (1) a fertile pinna with eleven sporangia, magnified, and (2) a separate sporangium, more magnified.

LYGODIUM.--(1) Summit of frond of L. palmatum, with fertile and sterile divisions; (2) a fruiting lobe enlarged, with two of the lower scales, or indusia, removed, displaying a sporangium under each; and (3) a sporangium more magnified.

OSMUNDA.--(1) Small piece of the frond of O. Claytoniana, with a fertile and a sterile pinna; (2) a portion of the fruit magnified; and (3) one sporangium more magnified.

BOTRYCHIUM.--Plant of B. ternatum, and (1) a portion of the fruit, with six sporangia, magnified.

OPHIOGLOSSUM.--Frond of O. vulgatum, and (1) a portion of the fruiting spike enlarged.

EXPLANATION OF PLATE XXI.