Chapter L: INTERMEDIUM, Fries. Resembling L. purpureum, but the calyx-teeth (3)

EQUISETUM.--(1) Upper part of fertile plant of E. limosum; (2) one of the shield shaped scales or receptacles of the spike, with the six sporangia underneath, enlarged; (3) same seen from below, discharging the spores; (4) a magnified spore with the club shaped filaments spreading; and (5) the same with the filaments coiled up.

LYCOPODIUM.--Plant of L. Carolinianum, and (1) a magnified scale of the spike removed, with the sporangium in its axil, discharging powdery spores.

SELAGINELLA.--Plant of S. rupestris; (1) part of a fertile spike, enlarged; (2) scale from the upper part of it, with its sporangium, containing innumerable powdery spores; (3) scale from the base, with its sporangium containing few large spores; and (4) three large spores.

ISOETES.--(1) Plant of I. lacustris; (2) sporocarp containing the minute spores, cut across, enlarged; (5) same divided lengthwise; (3) sporocarp with the large spores, divided lengthwise; and (4) three large spores more magnified.

AZOLLA.--(1) Plant; (2) a portion magnified, with conceptacles of both kinds; (3) the macrosporic one, more magnified; (4) the microsporic one, more magnified; (5) the same burst open, showing the stalked microsporangia; (6) one of the latter more magnified; (7) another bursting; and (8) three masses of microspores beset with glochidiate or barbed bristles.

EXPLANATION OF PLATE XXII.

RICCIA.--Plant of R. natans; section of thallus, showing two imbedded capsules and numerous air cavities; spores enclosed in a mother cell; three free spores; and calyptra with style.

ANTHOCEROS.--Plant of A. laevis; portion of the columella and valves of the capsule, with spores and elaters; two spores and two elaters.

NOTOTHYLAS.--Plants of N. orbicularis; section of the thallus through the involucre; apex of protruding capsule; lower half of capsule showing the columella; upper half of capsule; a gemma, an antheridium; twelve free spores, and two clusters of spores (4 in each).

ASTERELLA.--Plant of A. hemisphaerica; [female] receptacle viewed from above, the same from below; capsule dehiscing, with remains of calyptra at base; section of [male] disk; an elater, a portion of same, and spores.

SPHIEROCARPUS.--Plant of S. terrestris, cluster of five involucres; involucre enclosing a capsule; capsule filled with spores; and three spores.

DUMORTIERA.--Portions of [male] and [female] plants of D. hirsuta; [female] receptacle showing three involucres, two with capsules; capsule with calyptra; section of [male] disk; elater and portion of same; spores.

AITONIA.--Plant of A. Wrightii; upper view of [female] receptacle with three involucres; side view of same, involucre partly cut away showing capsule and remains of calyptra; a capsule closed, and dehiscent; an elater, a piece of same, and spores.

CONOCEPHALUS.--Parts of [male] and [female] plants of C. conicus; section of [female] receptacle, showing two involucres and capsules; capsule with ruptured calyptra; section of [male] disk; elaters, a portion of one, and spores.

PREISSIA.--Parts of [male] and [female] plants of P. commutata; section of [female] receptacle; perianth opened showing calyptra and capsule, section of part of [male] disk; elaters, a part of one, and spores.

MARCHANTIA.--Parts of [male] and [female] plants of M. polymorpha; section of receptacle; perianth, calyptra, and capsule; section of part of [male] disk; an elater, part of same, and spores.

FIMBRIARIA--Plant of F. tenella; [female] receptacle, and section of same; capsule dehiscing; elaters and spores.

PALLAVICINIA.--Plant of P. Lyellii, part of thallus with involucre, perianth, and calyptra; perianth cut away showing young calyptra; capsule closed, and dehiscent, antheridium enclosed in a leaf, elater and spores.

EXPLANATION OF PLATE XXIII.

PELLIA.--Plant of P. epiphylla; calyptra with base of pedicel; capsule; an elater, part of same, two spores, and two antheridia.

BLASIA.--Plants of B. pusilla; section of cavity at the end of the midrib showing young perianth and calyptra; end of thallus with calyptra and protruding capsule; capsule dehiscing; elaters and spores; part of elater and two spores; [male] thallus with two antheridia; gemmiparous thallus with two receptacles; section of a receptacle showing enclosed gemmae and the protruded orifice.

METZGERIA.--Plants ([male], [female], and gemmiparous) of M. furcata, and parts of same enlarged; hispid perianth with 2-lobed involucral leaf and base of pedicel; a gemma; an antheridium; elaters and spores.

ANEURA.--Plants ([male] and [female]) of A. sessilis; section of fleshy calyptra with base of pedicel; dehiscing capsule bearded by persistent elaters; elater, part of same, and spores; part of thallus with long deflexed [male] receptacles, and one cut transversely showing antheridia.

FOSSOMBRONIA.--Plant of F. pusilla, and a part enlarged; capsule dehiscing, with perianth and involucral leaves; part of stem with two leaves and dorsal antheridia; an antheridium, elaters, and spores.

GEOCALYX.--Plant of G. graveolens; two pairs of leaves with underleaves; part of stem with an underleaf; section of involucre showing calyptra and base of pedicel; dehiscent capsule; elaters and spores.

GRIMALDIA.--Parts of [male] and [female] plants of G. barbifrons; section of [male] disk; [female] receptacle and section of same; dehiscent capsule; elaters and spores.

CHILOSCYPHUS.--Plant of C. ascendens; a leaf with underleaf; a pair of leaves with antheridia; a part of stem with involucral leaves, perianth, and calyptra; dehiscent capsule; elaters and spores.

HARPANTHUS.--Plant of H. Flotovianus, and same enlarged; a pair of leaves with underleaf; perianth with involucral leaves, and section showing calyptra; elaters, a part of one, and spores.

LOPHOCOLEA.--Plant of L. heterophylla; a part enlarged with involucral leaves and perianth; cross section of perianth; three pairs of leaves with underleaves; a leaf and antheridium; an underleaf; an elater and spores.

CEPHALOZIA.--Plant of C. multiflora; two pairs of leaves; perianth with involucral leaves; an involucral leaf; calyptra; capsule closed, and dehiscent; an elater and spores.

GYMNOMITRIUM.--Plants of G. concinnatum; three pairs of leaves; apex of stem with involucral leaves and dehiscent capsule; two involucral leaves; calyptra.

MARSUPELLA.--Plant of M. emarginata; part of same with involucral leaves; involucre and perianth opened showing calyptra and base of pedicel; capsule; elater and spores.

EXPLANATION OF PLATE XXIV.

SCAPANIA.--Plant of S. undulata; apex of stem with involucral leaves and perianth enclosing calyptra; three pairs, of leaves, a capsule, elater and spores.

PLAGIOCHILA.--Plant of P. interrupta; five leaves; an underleaf; perianth enclosing calyptra; antheridia, capsule, elaters, and spores.

ODONTOSCHISMA.--Plant of O. Sphagni; parts of stems, one bearing gemmae, the other a perianth with involucral leaves; an involucral leaf; a capsule, elaters, and spores.

LEJEUNEA.--Plant of L. clypeata; perianth with capsule and involucral leaves; cross section of perianth; part of stein with [male] branch; leaves with underleaves; elaters and spores.

FRULLANIA.--Plant of F. Asagrayana; two pairs of leaves seen from above, and from below with underleaves and ventral lobes; perianth with involucral leaves; cross-section of perianth, involucral leaf; capsule, elaters, and spores.

PORELLA.--Plant of P. platyphylla; a pair of leaves with underleaves; part of stem with [male] spikes; an antheridium in its leaf; perianth with involucral leaves and capsule; an elater, and spores.

RADULA.--Plant of R. obconica; end of branch with perianth and capsule and lateral [male] branches; a [male] branch; an antheridium; leaves seen from above and below; a capsule, elater, and spores.

PTILIDIUM.--Plant of P. ciliare; a pair of leaves; an underleaf; perianth with involucral leaves; capsule, elater, and spores.

BAZZANIA.--Plant of B. trilobata; two pairs of leaves with underleaves and [male] spike; portion of [male] spike, and antheridium; capsule, elaters, and spores.

TRICHOCOLEA.--Plant of T. tomentella; leaf and underleaf; capsule; elater and spores.

HERBERTA.--Plant of H. adunca; portion with leaves and underleaves; perianth; capsules; elater and spores.

LEPIDOZIA.--Plant of L. reptans; portion with leaves and underleaves; antheridium in its leaf and free, perianth with involucre; capsule, elater, and spores.

KANTIA.--Plant of K. Trichomanis; leaves and underleaves; hairy involucre, and section showing calyptra; capsule with spiral valves; elater and spores.

EXPLANATION OF PLATE XXV.

JUBULA.--Plant of typical J. Hutchinsiae, enlarged; two pairs of leaves seen from below; a lower lobe separate and divided; a perianth with its outer involucre and the dehiscent capsule; an elater.

BLEPHAROSTOMA.--Plant of B. trichophylla, and same enlarged; perianth with the outer involucre, ventral side; two cross sections of perianth; portion of the margin of its orifice, expanded.

LIOCHLAENA.--Plant of L. lanceolata; end of fertile branch, with two leaves, two involucral leaves, and young perianth; summit of perianth, perianth and involucre, the capsule protruding; capsule on its pedicel, with remains of calyptra; capsule dehiscent.

MYLIA.--Plants of M. Taylori, enlarged; portion of stem, seen from beneath, a cauline leaf (below); an underleaf; an involucral leaf (above); perianth partly cut away, showing the calyptra and exserted dehiscent capsule.

DYPLOPHYLLUM.--Plant of typical D. albicans, enlarged; a folded leaf; a leaf with the upper lobe expanded to show the nerve; an involucral leaf seen from without, and from within; perianth, cut longitudinally; calyptra.

NARDIA.--Plant of N. crenulata (a slender small leaved form), enlarged; portion of upper stem with leaves; perianth; calyptra; elater and spores.

JUNGERMANNIA.--Sec. 1. Plants of J. Schraderi, natural size and enlarged; two leaves; two underleaves; involucre; summit of perianth.--Sec. 2. Plant of J. barbata, enlarged; portion of stem with leaves and underleaves; perianth with involucre; involucre.--Sec. 3. Plant of J. Helleriana, enlarged; summit of stem with leaves, involucre, and perianth; involucral leaves, margin of perianth unfolded--Sec. 4. Plants of J. inflata, natural size and enlarged; cauline leaves; involucral leaf.

LUNULARIA.--Sterile and fruiting plants of L. vulgaris, enlarged; section of involucre, showing calyptra and capsule; lunate receptacle of sterile plant, with gemmae.

MARSILIA.--Portion of plant of M. quadrifolia, a sporocarp; sporocarp burst in water and extruding the gelatinous ring with compartments attached.