110 CRUClFER^. Draba. 



41. — Greenland and jierliaps also (the original specimens) from the western coast of 

 Baffin's Bav. Many of the specimens from Greenland and Spitzbergen tliat have been 

 referred to it appear to belong, some to D. alpina and others to D. hirta. 



* * Caulescent ; stems few- or many-leaved : leaves entire or few-toothed. 



H— Flowers yellow. 



•H- Lower leaves often an inch long or more. 



D. hyperborea, Desv. More or less pubescent with very short branching hairs ; caudex 

 stout, simple ; stems simple or branched, decumbent, a span high or less : leaves oblanceolate, 

 coarselv toothed, 1 to 4 inches long including the broadly winged petiole ; the cauline some- 

 times obloug-obovate : flowers in a broad corymb : pods broadly elliptical to narrowly ob- 

 long and obtuse (var. spatulata, Gray), 3 to 9 lines long, usually glabrous, on spreading 

 pedicels 3 to 6 lines long; style half line long. — Jour. Bot. iii. 172 (1814). Ali/ssuin 

 hiinerboreum, L. Spec. ii. 651. D. yrandis, Langsd. in DC. Syst. ii. 355; Deless. Ic. Sel. 

 ii. 14, t. 47. Cuch/earia spathidata & C. siliquosa, Schlecht. in DC. Syst. ii. 369. C. septen- 

 trionalis, DC. Trodr. i. 174, uot Schlecht. — Alaska, from Sitka to the Aleutian Islands and 

 St. Paul's Island. 



D. chrysantha, Watson. Cespitose ; the caudex much-branched ; stems 1 to 5 inches 

 hio-h, olabrous or loosely pubescent : leaves deep green, very narrowly oltlanceolate ; the 

 few cauline linear to lanceolate, rarely few-toothed, glabrous or sparingly ciliate or somewhat 

 pubescent, i to 2 inches long : flowers bright yellow becoming whitish : calyx somewhat 

 villous : pods glabrous, oljlong to oblong-lanceolate, 3 to 6 lines long : pedicels usually short, 

 1 to 5 lines long : style slender, about half line long. — Proc. Am. Acad. xvii. 364. — High 

 peaks of Colorado, frequent ; peak south of Apache Pass, Arizona, Lemmon. 



D. Streptocarpa, Gray. Thinly villous with long spreading simple or branched hairs : 

 caudex simple or sparingly branched ; stems erect, simple or strictly branched, an inch to a 

 span hifh : leaves oblanceolate, or the cauline oblong or lanceolate, acute, rarely slightly 

 toothed, ciliate and more or less villous, 3 to 18 lines long: calyx glabrous or somewhat 

 villous : pods lanceolate, acute or acuminate, usually twisted, glabrous or often pubescent on 

 the margin, 3 to 6 lines long, on pedicels half as long ; style slender, a line long. — Am. 

 Jour. Sci. ser. 2, xxxiii. 242. — Mountains of Colorado and New Mexico ; Hiiachuca and 

 Santa Rita Mountains, Arizona, Lemmon, Pringle, a stellate-pubescent and but slightly 

 villous form, nearly approaching the following. 



D. aurea Vahl. Pubescent throughout with short stellate hairs and occasionally somewhat 

 pilose : caudex simple or sparingly branched ; stems usually rather stout, erect, usually 

 branched from the base upward, leafy, 2 to 15 inches high : leaves oblanceolate or the cauline 

 lanceolate, usually narrow, frequently ciliate at base, ^ to 2 inches long : calyx more or less 

 pubescent : petals bright yellow to nearl}^ white : pods lanceolate to linear, acute, pubescent 

 (rarely glabrous), often twisted, 3 to 6 lines long, on pedicels half as long; style half line 

 long or less. — Vahl in Hornem. Fors, CEc. Plantel. ed. 2, 599 ; Fl. Dan. t. 1460 ; Hook. Bot. 

 Mag. t. 2934. — In the Rocky Mountains from Mt. Selwyn, Brit. America, to New Mexico 

 and Utah ; Arizona, Santa Rita Mountains, Pringle, Mt. Graham and Mt. Agassiz, Lemmon, 

 the last with glabrous pods ; Mignon Island, Gulf of St. Lawrence, Linden. A form with 

 ovate pods has lieen collected in the Uinta Mountains, Utah, Watson, and in the Sawatch, 

 Bmnde(jee. ((ireenland.) 



Var. stylosa, Gray, 1. c. 243. Styles very slender, a line long. — Near Santa Fe', New 

 Mexico, Feiidler. Doubtful specimens collected by Bigelow near Albuquerque, New Mexico, 

 and by Eothrock in Sanoita Valley, Arizona, have some of the cauline leaves broad and 

 ovate. 



++ ++ Leaves small, half inch long or less. 



D. aureola, Watson. Rather densely stellate-pubescent throughout ; caudex simple or 

 branched ; stems short, simple, 4 inches high or less : leaves oblanceolate ; the cauline oblong, 

 obtuse, entire, half inch long : raceme dense in flower and fruit : calyx glalirous : pods 

 broadly oblong, obtuse, pubescent, not twisted, 4 to 5 lines long, on spreading pedicels 2 or 

 3 lines long ; style short (half line long), stout. — Bot. Calif, ii. 430. — Lassen's Peak, Calif., 

 Lemmon, ^Trs. Austin. 



D. corrugata, Watson, 1. c. Pubescent throughout with loose branching hairs ; caudex 



