Chapter I: CAROLINIANA, Watson, resembling n. 1, but with longer laxer and

greener leaves, and the very large seeds in one row in each cell, probably occurs in S. Va.

(Addendum) 2^a. I. hexagona, Walt. Stems flexuous, often low and slender (1--3 deg. high), leafy; leaves much exceeding the stem, 6--12'' broad; flowers solitary and sessile in the axils, large, deep blue, variegated with yellow, purple, and white; tube 1/2' long; segments about 3' long, the inner narrow; capsule oblong-cylindric, 6-angled, 2' long--Prairies, Ky. (_Short_) to W. Mo. (_Bush_), and on the coast from S. Car. southward.

[+][+] _Flowers copper-colored or dull reddish-brown; petals widely spreading._

3. I. fulva, Ker. Stem and leaves as n. 1; tube of the perianth cylindrical, as long as the 6-angled ovary; style-branches narrow. (I. cuprea, _Pursh._)--Swamps, S. Ill. and Mo. to La. and Ga. May.

[*][*] _Stems low (3--6' high), from tufted and creeping slender (or here and there tuberous-thickened) rootstocks, 1--3-flowered; tube of the perianth long and slender; the violet-blue divisions nearly equal._

4. I. verna, L. (DWARF IRIS.) _Leaves linear_, grass-like, rather glaucous; the thread-like tube of the perianth about the length of the divisions, which are oblong-obovate and on _slender claws_, the outer ones slightly hairy down the orange-yellow base, _crestless_; capsule obtusely triangular.--Wooded hillsides, Lancaster Co., Penn., to S. C., west to Ky. and Ala. April.--Flowers sometimes white with yellowish centre.

5. I. cristata, Ait. (CRESTED DWARF IRIS.) _Leaves lanceolate_ (3--5' long when grown); those of the spathe _ovate-lanceolate_, shorter than the _thread-like tube of the perianth_, which is 2' long and _much longer than the_ light blue obovate short-clawed _divisions_, the outer ones _crested_ but beardless; capsule sharply triangular.--In the mountains from Md. to N. C.; Trumbull Co., Ohio (_Ingraham_); knobs of S. Ind. May.--Flowers fragrant.

6. I. lacustris, Nutt. (LAKE DWARF IRIS.) _Tube of the perianth rather shorter than the divisions_ (yellowish, 1/2--3/4' long), _dilated upward_, not exceeding the spathe; otherwise as in the last, and too near it.--Gravelly shores of Lakes Huron and Michigan. May.