GENTIANACEAE (GENTIAN FAMILY) 381 







Flowers smaller (less than 3 cm. long); corolla-lobes never fringed. 



Flowers solitary on a long terminal peduncle . . 3. G. monantha. 



Flowers few-many. 



Sepals very unequal, two of them foliaceous and overlapping 



the others k 4. G. heterosepala. 



Sepals somewhat unequal but none foliaceous. 



Flowers very numerous, in a spike-like thyrse, short- 



pediceled; leaves generally as long as the internodes . 5. G. strictiflora. 

 Flowers fewer, oiten long-pediceled; some of the internodes 



much exceeding the leaves . . . . . 6. G. plebeja. 



Perennials; corolla plicate at the sinuses, the folds more or less ex- 

 tended into thin teeth or lobes. 

 Anthers distinct. 



Corolla open-campanulate or funnelform, the lobes spreading; 



the subtending leaves broad. 



Flowers always yellowish but freely spattered with purplish- 

 brown spots; the basal leaves persistent . . . 7. G. Romanzovii. 

 Flowers blue or blue-purple, or rarely ochroleucous, the basal 



leaves deciduous. 

 Flowers solitary / . . .'.. . . . . . 8. G. calycosa. 



Flowers 1-5 9. G. Parryi. 



Corolla funnelform, its lobes but slightly divergent; the subtend- 

 ing leaves narrow. 

 Leaves oblong-lanceolate to ovate. 



Calyx-lobes present . . . . . . . . 10. G. affinis. 



Calyx-lobes wanting or minute and irregular . . . 11. G. Forwoodii. 

 Upper leaves linear to lance-linear . . . ' . : '". 12. G. Bigelovii. 



Anthers cohering in a ring ........ 13. G. Andrewsii. 



1. Gentiana elegans A. Nels. Bull. Torr. Bot. Club 25: 276.. 1898. Annual, 

 2-3 dm. high, branched from the base, the 2-20 stems simple or nearly so, 

 each stem or branch terminated by a single flower: leaves 3-6 pairs on each 

 stem, mostly obtuse; the lower petioled, obovate to broadly spatulate; the 

 upper sessile, oblong or narrower: calyx-lobes nearly equal and similar, equal- 

 ing the tube: corolla 4-5 cm. long, deep blue with lighter patches or streaks 

 downward; the lobes obovate-oblong, dentate around the summit, fimbriate 

 on the sides: capsule stipitate: style nearly as long as the capsule proper, the 

 stigma suborbicular, dentate. G. serrata. ROCKY MOUNTAIN FRINGED GEN- 

 TIAN. Frequent in moist subalpine parks; throughout our range. 



la. Gentiana elegans unicaulis A. Nels. 1. c. Reduced, simple-stemmed 

 alpine form. Same range. 



2. Gentiana barbellata Engelm. Trans. Acad. St. Louis 2: 216. 1863. 

 Perennial from slender fleshy rootstocks, about 1 dm. high, glabrous through- 

 out, 1-2-flowered: leaves about 4 pairs, narrowly oblanceolate to broadly 

 linear, 2-3 cm. long: calyx green with purple streaks, about 15 mm. long; the 

 lobes triangular-lanceolate, equaling or exceeding the tube : corolla dark blue, 

 about 25 mm. long; the lobes oblong, obtuse, exceeding the tube, conspic- 

 uously long setaceous-lacerate on the sides and often nearly to the summit 

 which is obscurely dentate; the tube arachnoid woolly within especially 

 toward the base: filaments stout, flattened, equaling the tube: stipe half as 

 long as the elliptic-oblong capsule: style almost wanting. (G. Moseleyi A. 

 Nels. Bot. Gaz. 31: 396. 1901.) PERENNIAL FRINGED GENTIAN. Rare; in 

 the Colorado mountains. 



3. Gentiana monantha A. Nels. Bull. Torr. Bot. Club 31: 244. 1904. An 

 alpine annual, mostly much less than 1 dm. high; stem simple or with one or 

 two branchlets from the base, only 1-3 cm. high, terminated by a slender, 

 naked, 1-flowered peduncle very much longer than the stem: leaves oblong to 

 spatulate, 5-10 mm. long: calyx one fourth shorter than the corolla and some- 

 what exceeding the tube ; sepals 4, equal, oblong-lanceolate, subacute, distinct 

 nearly to the base: corolla about 12 mm. long; the tube twice as long as the 

 4 lance-ovate, subacute lobes; the fimbriae of the crown rather coarse and 

 short: stamens shorter than the corolla-tube. G. tenella. In the high moun- 

 tains of Colorado. 



4. Gentiana heterosepala Engelm. 1. c. 115. Annual, 1-3 dm. high, mostly 

 simple, with few pairs of leaves and long internodes: flowers terminal and 

 axillary, either solitary and long-peduncled or else in threes with shorter 

 pedicels, 15-20 mm. long: calyx with two greatly enlarged, foliaceous, ovate 



