GE$."TlANACEiE. (GENTIAN FAMILY.) 387 



L., partly.) — Damp woods, from the northern parts of Maine, to Wisconsin, and 

 northward. July, August. 



5. GENTIANA, L. Gentian. 



Calyx 4-5-clcft. Corolla 4-5-lobed, regular, usually with intermediate 

 plaited Colds, which hear appendages or teeth at the sinuses. Style short or 

 none: stigmas 2, persistent. Pod oblong, 2-valved ; the innumerable seeds 

 either borne on placentae at or near the sutures, or in most of our species cover- 

 ing nearly the whole inner face of the pod. (First shown by Prof. II. J. Clad-'.) 



— Flowers solitary or eymose, showy, in late summer and autumn. (Name 

 from Gentius, king of Illyria, who used some speeies medicinally.) 



§ 1. AMARELLOtDES, Torr. & Gr. Corolla tubular-funnel-form, without 

 croivn or plaited folds, and with the lobes naked: anthers separate, fixed by 

 the middle, introrse in the bud, but reftexed after the flower opens : seeds whig- 

 less : annuals. 



1. G. quinquefl6ra, Lam. (Five-flowered G.) Stem rather slen- Ay fr^t. 

 der, branching (1° high) ; leaves ovate-lanceolate from a partly clasping and 

 heart-shaped base, 3 - 7-nerved, tipped with a minute point; branches raeemed 



or panicled, about 5-flowered at the summit ; lobes of the small 5-cleft calyx 

 awl-shaped-linear ; lobes of the palc-bluc corolla triangular-ovate, bristle-pointed, 

 one fourth the length of the slender obconical tube. — Var. occidentAlis has 

 linear-lanceolate calyx-lobes, more leaf-like, about half the length of the corolla. 



— Dry hilly woods, Maine to Wisconsin and southward, especially along the 

 Alleghanies : the var. is the common form in the Western States. — Corolla 

 nearly 1' long ; in the variety proportionally shorter. 



§ 2. CROSSOPETALUM, Frcel. Corolla funnel-form, gland-bearing between the 

 bases of the f laments, without crown or plaited folds ; the lobes fringed or toothed 

 on the margins : anthers as in § 1 : pod somewhat stalked : seeds wingless, clothed 

 with little scales: annuals or biennials. 



2. G. crinita, Froel. (Fringed G.) Flowers solitary on long peduncles 

 terminating the stem or simple branches ; leaves lanceolate or ovate-lanceolate from 

 a partly hart-shaped or rounded base ; lobes of the 4-cleft calyx unequal, ovate and 

 lanceolate, as long as the bell-shaped tube of the sky-blue corolla, the lobes of- 

 which are wedge-obovate, and strongly fringed around the summit ; ovary lanceolate. 



— Low grounds, New England to Kentucky and Wisconsin : rather common. — 

 Plant l°-2° high : the showy corolla 2' long. 



3. G. detonsa, Fries. (Smaller Fringed G.) Stem simple or with 

 slender branches, terminated by solitary flowers on very long peduncles ; leaves 

 linear or lanceolate-linear ; lobes of the 4- (rarely 5-) cleft calyx unequal, ovate or 

 triangular and lanceolate, pointed ; lobes of the sky-blue corolla spatulate-oblong, 

 with ciliate-fringed margins, the fringe shorter or almost obsolete at tlie summit ; 

 ovary elliptical or obovate. — Moist grounds, Niagara Falls to Illinois and north- 

 westward. Passes into the last. (Eu.) 



§ 3. PNEUMONANTHE, Necker. Corolla bell-shaped or obconical, 5-lobed, 

 with plaited folds which project into appendages in the sinuses : anthers erect, 



