GENTIANACEAE (GENTIAN FAMILY) 383 



leaves 6-16 pairs, ovate or oblongTlanceolate: flowers from numerous and 

 thyrsoid-raicemose to few or rarely almost solitary; bracts lanceolate or linear: 

 calyxTlobes liniear or subulate, unequal and variable, the longest rarely equal- 

 ing the tube, the shorter sometimes minute: corolla 2-3 cm, long, rather 

 narrowly funnelform; the lobes ovate, acutish or mucronulate-pointed, spread- 

 ing; the laciniate-toothed or cleft appendages at the sinuses sometimes almost 

 equaling the lobes. (G. interrupta Greene, 1. c. 182.) — ^Very frequent at mid- 

 dle elevations in our range. 



ll.Gentiana Forwoodii Gray, Proc. Am. Acad. 19: 86. 1883. Resembling 

 G. affnis, but the corolla decidedly smaller, about 18 mm. long, narrow, and 

 with shorter and rounder lobes, these little surpassing the plicate append- 

 ages: stems equably leafy to the very top: calyx subcampanulate, with no 

 vestige of lobes or teeth. — Rare in Colora,do and Utah but frequent in north- 

 western Wyoming. 



12. Genaana Bigdovii Gray, 1. c. 87. Near G. affinis, very leafy: leaves 

 thick; the lower lanceolate-oblong; the upper linear and the floral often much 

 exceeding the flowers: stems 1-3 dm. high, somewhat scabrous: flowers densely 

 spicate: calyx-teeth very slender, as long as the tube: corolla 20-25 mm. 

 long, isUghtly scabrous on the outside; the lobes short, broadly ovate, twice as 

 long as the bifid appendages: stipe of the capsule short and fistulous. — 

 Colorado to New Mexico and Arizona. 



13. Gentiana Andrewsii Griseb. in Hook. Fl. Bor. Am. 2: 55. 1834. Stems 

 upright, smooth: leaves ovate-lanceolate: calyx-lobes lanceolate, half as long 

 as the tube: corolla blue, with pale streaks, somewhat cylindric-clavate, 

 nearly closed at the mouth, twice as long as the calyx, nearly truncate at the 

 summit with the lacerate appendages as long as the lobes. — Infrequent; 

 stream banks of northern Colorado. Apparently our plants are not identical 

 with the eastern form' of this species. 



6. SWERTIA L. 



Simple-stemmed perennials, occasionally with alternate leaves, the lower 

 at least tapering into margined petioles. Inflorescence thyrsoid; flowers blue 

 or purple,, iVarying to white, Corolla rotate, 4- or 5-lqbe,4. Style very short 

 or none; stigma 2-lobed or 2-lamellate. Capsule ovate. 



Flowers 4-merou3 . 1. S. scopulina. 



Flowers 5-merous. 



Inflorescence elpiigated; corolla-lobes oblong or narrower , . , 2. S. palustris. 



Inflorescence capitate-congested; corolla-lobes elliptic to oval . , 3. 8. congesta. 



1. Sw6rtia scopulina Greene, Pitt. 4: 184. 1900. Plant 1-4 dm. high: 

 inflorescence very strict: leaves broadly oblanceolate orspatulate^blanceolate; 

 radical leaves very large, often more than half the length of the subscapi- 

 form stem, usuajly all, even the lowest and largest cauline ones, alternate, with 

 broad-wjnged petioles and half -clasping: flowers 4-merous: sepals lanceolate- 

 Siibulate, often 3-nerved, and threie fourths as long as the corolla-lobes; these 

 10-14 mm. long, dark blue-purple:, glands subiilate-fiinged: seeds round- 

 obovate varying to somewhat quadrangular, very distinctly winged on one, 

 two, or three sides, the testa wrmkled .^Colorado and New Mexico. 



2. Swertia palustris A. Nels. Bull. Torr. Bot. Club 28: 227. 1901. Stems 

 simple, erect, glabrous, 2-3 dm. high: leaves glabrous, thin, entire or rarely 

 denticulate ; "radidal leaves oblong to elliptic, obtuse, 5^10 cm. long; stem leaves 

 several, generally in pairs but not rarely alternate, spatulately oblanceolate 

 or broader:' inflorescence very strict; peduncles; erect, axillary to thci bracts 

 and uppermost leaves, 1-3-flowered; flowers, 5imerous: sepals subulate- 

 lanceolate, delicately nerved, about half as long as the petals: corolla-lobes 

 dark blue shading to purple, oblong, obtuse, about 10 mm. long, 3-4 mm. 

 broad; glands orbicular, the appendages few (10 or less), sjiprt-subulate: 

 seeds lenticular, wing-margined. — Shaded mountain bogs; Wyoming and 

 Colorado- 



