WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 277 
KEY TO THE SPECIES. 
Winter annuals; styles obsolete. 
Petals yellow; leaves extending well up on the stem........ 1. D. montana, 
Petals white or wanting; leaves clustered at the base of the 
stem, 
Petals wanting or very small.............-.------------ 2. D. micrantha. 
Petals conspicuous. 
Leaves all entire; pedicels clustered at the end of 
the stem....... 22.22. eee eee eee ee eee 3. D. coloradensis. 
Leaves toothed; fruit in an elongated raceme......- 4, D. cuneifolia. 
Perennials, or occasionally biennials, sometimes flowering the 
first year; style conspicuous, 1 mm. long or more. 
Basal leaves long-ciliate, the hairs simple or nearly so. 
Stems pubescent; cauline leaves pubescent on both 
surfaces... ...---.-- 2-2 eee eee eee eee 5. D. streptocarpa. 
Stems glabrous; cauline leaves glabrous on the faces, 
usually ciliate.......... fe ence cece cece eeeeeeeee 6. D. tonsa. 
Basal leaves not long-ciliate; hairs branched. 
Petals white..........2.22 2. eee eee ee ence eee eee eeee 7. D. cana. 
Petals bright yellow. 
Stems equally leafy throughout, the cauline leaves 
larger than the basal ones, (Plants large, 
usually 20 cm. high or more), 
Stems solitary, simple below.......-......----- 9. D, helleriana. 
Stems clustered, usually branched below...-.-.- 10. D. patens. 
Stems with reduced leaves or almost naked; basal 
leaves much larger and more conspicuous 
than the cauline ones, 
Basal leaves oblanceolate or obovate, 15 to 25 
mm. wide, toothed; stems almost naked..11. D. mogollonica. 
Basal leaves oblanceolate or narrower, less than 
5 mm. wide, entire; stems with more 
numerous leaves. 
Roots slender; stems finely stellate-pubes- 
cent.......-.---.--2..--------- eee 8. D. neomericana. 
Roots thick and woody; stems long-pubes- 
cent or glabrous. 
Leaves glabrous or nearly so, acute or 
acutish; stems glabrous, slender.13. D. gilgiana. 
Leaves all pubescent and ciliate, obtuse; 
stems pubescent, stout..........- 12. D. petrophila. 
1. Draba montana 8. Wats. Proc. Amer. Acad. 14: 289. 1879. 
Type Locauity: South Park, Colorado, 
RanaeE: Colorado and New Mexico. 
New Mexico: Rio Pueblo (Wooton). Mountains, in the Canadian Zone. 
2. Draba micrantha Nutt.; Torr. & Gray, Fl. N. Amer. 1: 109. 1838. 
Draba caroliniana micrantha A. Gray, Man. ed. 5. 72. 1867. 
Type LocALITy: Open plains and rocky places about St. Louis, Missouri, and in 
Arkansas. 
RanGe: Washington and Illinois to New Mexico and Texas. 
New Mexico: Nutritas Creek below Tierra Amarilla (Eggleston 6495). Open 
slopes, in the Upper Sonoran and lower parts of the Transition Zone. 
