394 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



2. Dodecatheon pauciflomm (Durand) Greene. Shooting-star. Frequent at 

 nearly ail altitudes, but most common above timber line, in moist woods, begs, or 

 meadows. B. C. and Wash, to Colo, and Sask.— Glabrous perennial, 10 to 40 cm. 

 high; leaves oblanceolate, 3 to 10 cm. long, pale green, entire, obtuse; flowers few 

 or numerous; corolla lobes about 1 cm. long; anthers 4 to 5 mm. long, purple, the 

 filaments yellow; capsule 10 to 15 mm. long. 



A handsome plant, often conspicuous in alpine meadows. The flowers last only 

 a short time. 



68. GENTIANACEAE. Gentian Family. 



1. GENTIANA L. Gentian. 



Annual or perennial herbs; leaves opposite, entire, sessile; flowers in the leaf 

 axils or clustered at the ends of the stems; calyx 4 or 5-lobed; corolla usually funnel- 

 shaped, 5-lobed; fruit a 1-celled capsule. 

 Corolla 2 cm. long or shorter. 



Corolla lobes obtuse 1. G. glauca. 



Corolla lobes acute. 



Corolla with a fringed crown in the throat 2. G. acuta. 



Corolla without a crown in the throat 3. G. propinqua. 



Corolla 2.5 to 4 cm. long. 



Leaves linear, lanceolate, or oblong; corolla 2.5 to 3 cm. long; calyx lobes linear or 



linear-lanceolate 4. G. affinis. 



Leaves usually very broadly ovate; corolla commonly 3.5 to 4 cm. long; calyx lobee 

 oval to oblong 5. G. calycosa. 



1. Gentiana glauca Pall. Reported from Sperry Glacier by Jones. Alaska, B. C, 

 and Mont.; also in Asia. {Dasy Stephana glauca Rydb.) — Perennial, 2 to 10 cm. high, 

 glabrous, with a rosette of basal leaves; stem leaves 2 or 3 pairs, oval or obovate, 

 1 cm. long; corolla blue, 12 to 18 mm. long. 



2. Gentiana acuta Michx. Northern gentian. Occasional at low altitudes, in 

 wet thickets or woods or in bogs, sometimes on slopes above timber line. Alaska to 

 Calif., N. Mex., Me., and Lab.; also in Eur. and Asia. {Amarella scopulorum 

 Greene.) — Annual; stems slender, glabrous, 15 to 30 cm. high, simple, leafy; leaves 

 oblong or lanceolate, 1 to 3 cm. long, acute or obtuse; corolla pale blue or lavender. 



3. Gentiana propinqua Richards. Piegan Pass, on open rocky slope. Alaska, 

 B. C, Mont., and Alta.; also in Asia. (Amarella propinqua Greene.) — Annual, 

 3 to 15 cm. high, glabrous, commonly l-flowered; stem leaves lanceolate or ovate, 

 5 to 12 mm. long; corolla pale blue, 1 to 1.5 cm. long. 



4. Gentiana affinis Griseb. Prairie gentian. Low places on prairie at east 

 entrance. B. C. to Colo, and Sask. {Dasystephana affinis Rydb.) — Plants usually 

 tufted, 10 to 30 cm. high, glabrous; leaves 2 to 4 cm. long, acute or obtuse; corolla 

 blue, with a narrow tube. 



5. Gentiana calycosa Griseb. Blue gentian. Common in meadows above timber 

 line; occasionally found in moist places at middle altitudes. Wash, to Calif., Wyo., 

 and Mont. (Dasystephana calycosa Rydb.; D. obtusiloba Rydb.) — Stems 10 to 30 cm. 

 high, glabrous, often in small clumps; leaves 1 to 3 cm. long, obtuse or acutish at 

 the apex; flowers 1 or few, deep blue. 



One of the finest flowers of the park, frequently very abundant in alpine meadows. 

 The flowers last a long time, and the first ones appear in early summer. Dwarfed 

 plants sometimes have corollas only 3 cm. long or even shorter. All our material 

 belongs to Dasystephana obtusiloba Rydb., the type of which came from the Sperry 

 Glacier region, but there seem to be no important differences between this form and 

 Gentiana calycosa. 



