GENUS 5. GENTIAN FAMILY. It 
1. Dasystephana affinis (Griseb.) Rydb. Ob- 
long-leaved Gentian. Fig. 3353. 
Gentiana affinis Griseb, in Hook. Fl. Bor. Am. 2: 56, 1834. 
D. affinis Rydb, Bull, Torr. Club 33: 149. 1906. 
Perennial; stems clustered from deep roots, minutely 
puberulent, simple, 6-18’ high. Leaves linear-oblong 
to lanceolate-oblong, obtuse or acutish, rounded or 
narrowed at the base, firm, roughish-margined, indis- 
tinctly nerved, 4’-14’ long, the floral smaller; flowers 
few, numerous, or rarely solitary, 5-parted, sessile and 
solitary or clustered in the axils of the upper leaves, 
about 1’ high, not bracted under the calyx; calyx-lobes 
linear or subulate, unequal, the longer about equalling 
the tube, the smaller sometimes minute; corolla nar- 
rowly funnelform, blue, its lobes ovate, acute or mu- 
cronate, entire, spreading, with laciniate appendages in 
the sinuses; anthers separate; seeds broadly winged. 
In moist soil, Minnesota to British Columbia, south in 
the Rocky Mountains to New Mexico. Aug.—Oct. 
A) 
2. Dasystephana pubérula (Michx.) Small. 
Downy Gentian. Fig. 3354. 
Gentiana tuberula Michx. Fl. Bor. Am, 1: 176. 1803. 
D. puberula Small, Fl. SE. U. S. 930. 1903. 
Perennial; stems usually solitary, leafy, 8-18’ high, 
minutely puberulent or glabrous, nearly terete. Leaves 
firm, lanceolate, or the lower oblong, roughish- 
margined, indistinctly nerved, pale beneath, nar- 
rowed or rounded at the base, 1’-3’ long; flowers 
sessile or nearly so in the upper axils, rarely soli- 
tary and terminal, 2-bracteolate under the calyx, 
14’-2’ high; calyx-lobes linear-lanceolate, equal, about 
as long as the tube, rough; corolla campanulate- 
funnelform, 2-3 times as long as the calyx, its lobes 
ovate, entire, spreading, much longer than the cleft 
or laciniate appendages; anthers at first connivent, 
soon separate; seeds oblong, broadly winged. 
On prairies, Maryland to Ohio, Minnesota, South 
Dakota, Georgia and Kansas, Aug.—Oct. 
3. Dasystephana parvifolia (Chapm.) 
Small. Elliott’s Gentian. Fig. 3355. 
?Gentiana rigida Raf. Med. Fl. 1: 212. 1832. 
Gentiana Elliottii Chapm, Fl, S, States, 356. 1860. 
Not Raf, 
?Gentiana scaberrima Kusnezow, Act. Hort. Petrop. 
13: 59. 1893. 
D. parvifolia Small, Fl. SE. U. S. 930. 1903. 
D. latifolia Small, Fl. SE. U.S. 930. 1903. 
Perennial; rootsacluster of thick fibres; stems 
slender, leafy, terete, minutely rough-puberulent, 
simple, 8’-2° high. Leaves ovate or lanceolate, 
acute or acutish at the apex, rounded or narrowed 
at the base, thin, roughish-margined, 1’-2’ long, 
3-nerved, or the lower much smaller and obtuse 
flowers 1-4, terminal, or rarely I or 2 in the 
upper axils, about 2’ long, sessile, 2-bracteolate 
under the glabrous calyx; calyx-lobes oblong or 
lanceolate, foliaceous, longer than the tube; co- 
rolla campanulate-funnelform, blue, its lobes 
ovate, obtuse, sometimes mucronate, entire, 3-4” 
long, about twice as long as the fimbriate or 
toothed appendages; anthers cohering in a tube; 
seeds oblong, broadly winged. . 
In moist soil, Virginia to Florida, Sampson snake-root.. Sept.—Oct. 
Gentiana decéra Pollard, of the same range, differs in having the calyx-tube pubescent. 
