222 CRUCIFERAE (MUSTARD FAMILY) 



not differ from the species D. caroliniana Walt, except in the hispid silique. 

 Throughout our range and eastward to the Missouri. 



5. Draba cuneifolia Nutt. T. & G. Fl. 1: 108. 1838. Low, usually less 

 than 1 dm. high: leaves clustered near the base, obovate to ob lanceolate, 

 entire or few-toothed, loosely stellate-pubescent, acutish, 1-3 cm. long: 

 sea pose stems solitary or few, usually loosely stellate-pubescent: flowers 

 small, white: silique linear-oblong, mostly subacute, minutely hispid, 8-10 

 mm. long, on divaricate pedicels much shorter. (D. color adensis Rydb. Bull. 

 Torr. Bot. Club 31: 555. 1904.) Infrequent; from Missouri to California. 



6. Draba reflexa Greene, Pitt. 4: 20. 1899. Stem stout, erect, about 1 dm. 

 high, racemose almost from the base: leaves mostly in a dense rosulate basal 

 tuft, oblong-lanceolate, entire or sparingly toothed, nearly glabrous super- 

 ficially, but the margin hirsute-ciliate : calyx glabrous, the thin sepals tinged 

 with purple: petals white, showy: pedicels widely spreading, in fruit de- 

 flected, much exceeding the pods in length, these elliptic-oblong, 6-8 mm. 

 long, glabrous, the stigma small and sessile. Camp Stambaugh, Wyoming. 



7. Draba nemorosa L. Sp. PI. 643. 1753. Low slender loosely stellate- 

 pubescent annual, 5-30 cm. high: stems simple or with a few short slender 

 branches from near the base: leaves mostly toward the base but hardly ros- 

 ulate, ovate to oblong-lanceolate, entire or toothed, 1-3 cm. long: flowers 

 crowded, but the fruiting raceme long and open: sepals villous: petals yellow, 

 small: siliques narrowly oblong, minutely pubescent, 8-12 mm. long, much 

 shorter than the slender spreading pedicels. D. nemorosa and varieties. 

 Colorado, north to Montana and thence both eastward and westward. 



8. Draba lapilutea A. Nels. Stellate-pubescent throughout and villous 

 below, 1-3 dm. high: stems erect, rather stout, simple or with some slenderer 

 branches from near the base: leaves oblanceolate or oblong to nearly linear, 

 mostly radical and on the lower part of the stem, 1-2 cm. long: petals small, 

 spatulate, yellowish or turning white in drying, longer than the elliptic sepals: 

 silique linear-oblong 8-12 mm. long, suberect, on much shorter spreading 

 pedicels; the style wanting or barely discernible. D. montana (name un- 

 tenable. (D yellowstonensis A. Nels. Bot. Gaz. 30: 189. 1900, a name to be dis- 

 carded.) In the mountains; Colorado to Montana. 



9. Draba densifolia Nutt. T. & G. Fl. N. A. 1: 104. 1838. Densely caespi- 

 tose in somewhat close tufts: scapes only 3-6 cm. high, more or less woolly- 

 hirsute: leaves greatly crowded on the crowns of the caudex, oblong-linear, 

 strongly ciliate and woolly-hirsute with nearly simple hairs: flowers small, 

 yellow or turning white: siliques crowded at summit of scape, broadly ovate, 

 pubescent, about 5 mm. long; the style about one fourth as long. D. ventosa.(ty 

 Wyoming, Idaho, and Montana. 



10. Draba oligosperma Hook. Fl. Bor. Am. 1: 51. 1830. Subcaespitose, the 

 leaves mostly rosulate at the base of the few short (4-8 cm. high) slightly 

 pubescent scapes: leaves suberect, linear or oblong, rigid, ciliate, stellately 

 pubescent on both sides, especially toward the apex: petals white, twice as 

 long as the slightly hairy calyx: siliques quite pubescent, suborbicular; the 

 style one fourth as long. Northern Wyoming (probably), Montana, and to 

 the north and west. 



11. Draba andina (Nutt.) A. Nels. Bull. Torr. Bot. Club 26: 352. 1899. 

 Very densely caespitose, the numerous branches of the caudex closely covered 

 with the persistent imbricated leaf-bases: leaves mostly oblong, rather rigid, 

 ciliate an-1 stellate-pubescent: scapes glabrous, 3-8 cm. high: flowers numerous, 

 yellow or turning white: silique broadly ovate to orbicular, 3-4 mm. long; 

 the cells about 2-seeded; style short, about one fourth as long as the silique. 



ly />. xtrlltita and some of its varieties. Barren soils, mostly at high 

 elevations: Wyoming :md northward. 



12. Draba saximontana A. Nels. Bull. Torr. Bot. Club 27: 264. 1900. 

 Much like the last, equally caespitose: leaves linear, ciliate and stcllatc- 



pefl numerous, glabrous, many-flowered: petals spatulate, 



loii^r as the elliptic glabrate sepals: siliques ovate-oblong, subacute, 



obscurely pulx-so-nt with simple hairs, 4-5 mm. long, 6-8 times as long as 



