GENTIANACEAE (GENTIAN FAMILY) 657 



2. G. pr<5cera Holm. Stem 1.5-5 dm. high; leaves linear or lance-linear, 

 acute, the basal spatulate; lobes of the 4-cleft calyx unequal, alternately lance- 

 triangular and linear-lanceolate, all pointed and keeled and scabrous on the back ; 

 lobes of the sky-blue corolla roundish, with ciliate-f ringed margins and merely 

 dentate summit; ovary elliptical. (6r. serrata Man. ed. 6, not Gunner; G. 

 detonsa Am. auth., not Rottb.) Moist grounds, N. Y. and Ont. to Man. and la. 



* * Flowers smaller, 4-5-merous; corolla somewhat funnel-form or salver-form, 



Us lobes entire ; peduncles short or none, terminal and lateral on the acute- 

 angled stem. 



3. G. AmarSlla L. Stems 0.5-6 dm. high ; leaves lanceolate to narrowly 

 oblong, or the lowest obovate-spatulate, the margins minutely scabrous ; calyx- 

 lobes (4-5) foliaceous, lanceolate or linear ; corolla blue, lavender, or white, 

 8-15 mm. long, with a fimbriate crown at the base of the oblong acute lobes; 

 capsule sessile. Eurasia. 



Var. acuta (Michx.) Herder. Calyx almost 5-parted ; crown usually of fewer 

 and sometimes very few setae. (G. acuta Michx.) Barrens, meadows, arid 

 rocky banks, Lab. to Alaska, s. to n. N. B., n. Me., n. Vt., Minn., N. Dak., 

 N. Mex., and Cal. (Asia.) 



4. G. quinquefblia L. Slender, simple or branching, 0.5-6 dm. high ; leaves 

 ovate-lanceolate from a partly clasping and heart-shaped base, 3-7-nerved, 

 tipped with a minute point ; branches racemed or panicled, about 5-flowered 

 at the summit ; lobes of the small 5-cleft calyx awl-shaped-linear ; corolla pale 

 blue or ochroleucous, 1-2 cm. long, its lobes triangular-ovate, bristle-pointed, 

 without crown, but the glands at the base of the slender obconical tube manifest ; 

 capsule stipitate. (G-. quinqueflora Hill, a more appropriate but later name.) 

 Moist hills, s. Me. to Ont., 111., and Fla. Var. OCCIDENTALS (Gray) Hitchc. 

 Often taller and paniculately much branched ; calyx-lobes more leaf-like, linear- 

 lanceolate to oblong-lanceolate, reaching to the middle of the broader funnel- 

 form corolla. O. to Minn. , and southw. 



2. PNEUMONANTHE [Gleditsch] Link. Corolla (funnel-form or salver- 

 form) with thin-membranaceous toothed or lobed plaits in the sinuses; no 

 crown nor glands; capsule stipitate; autumn-flowering perennials, the 

 flowers large, sessile or short-pedunculate and bibracteate (except in no. 12). 



* Anthers unconnected or soon separate; leaves rough-margined; seeds winged. 



5. G. affinis Griseb. Stems clustered, 1-4.5 dm. high; leaves oblong or 

 lanceolate to linear ; flowers numerous and thyrsoid-racemose or few or rarely 

 almost solitary ; calyx-lobes unequal, the longest rarely equaling the tube, the 

 shortest sometimes minute ; corolla blue or bluish, 2-3 cm. long, rather nar- 

 rowly funnel-form, with ovate spreading lobes, the plaits with conspicuous 

 laciniate appendages sometimes equaling the lobes. Damp soil, Minn, and 

 westw. 



6. G. pubSrula Michx. Stems mostly solitary, erect or ascending, 1.5-5 dm. 

 high, mostly rough and minutely pubescent above ; leaves rigid, linear-lanceolate 

 to oblong-lanceolate, 2-7 cm. long ; flowers clustered, rarely solitary ; calyx- 

 lobes lanceolate, much shorter than the bell-funnel-form open bright blue corolla, 

 the spreading ovate lobes of which are twice or thrice the length of the cut- 

 toothed appendages. Dry prairies and barrens, Md. to Ga., Kan., and Minn. 

 Oct. 



** Anthers cohering in a ring or short tube; flowers in terminal and often 



axillary clusters. 



Calyx-lobes and bracts ciliolate-scabrous ; seeds conspicuously winged ; leaves 

 somewhat rough-margined. 



7. G. Saponaria L. (SOAPWORT G.) Stem erect or ascending, smooth; 

 leaves ovate-lanceolate, oblong, or lanceolate-obovate, narrowed at the base 

 calyx-lobes linear or spatulate, acute, equaling or exceeding the tube, half the 

 length of the corolla ; lobes of the club-bell-shaped light blue corolla obtuse, 



GRAY'S MANUAL 42 



