258 PROCEEDINGS OP THE AMERICAN ACADEMY 



than the yellowish ovate sepals : pods broadly ovate-elliptical, acutish 

 or obtuse, 2 lines long, ascending on pedicels about a line long ; style 



15. D. Lemmoni, Watson. High alpine, densely cespitose : leaves thick, 

 spatulate or oblong-obovate, ciliate and pilose with simple or forked hairs or 

 nearly glabrous : scapes pilose : pods pubescent or glabrous, ovate to broadly 

 lanceolate, somewhat twisted, on slender spreading pedicels ; style short and 

 stout. — Bot. Calif. 2. 430. D. alpina, var. algida, Bot. Calif. 1. 29, mainly. 

 Peaks of the Sierra Nevada and of the Blue Mountains, Oregon. 



16. D. ventosa, Gray. Cespitose, the slender branches of the caudex more 

 or less densely leafy : leaves oblong-oblanceolate, densely stellate-pubescent or 

 glabrate : pods ovate to oblong-lanceolate, densely pubescent to glabrous, on 

 ascending pedicels ; style short and slender. — Am. Nat. 8. 212. D. alpina, 

 Watson, Bot. King, 20. Northern Utah and northwestern Wyoming; Stein's 

 Mountain, southeastern Oregon. 



17. D. edrtcarpa, Gray. Densely cespitose and stellate-pubescent : leaves 

 oblanceolate, the scapes scarcely longer, few-flowered : pods large, oblong- 

 obovate, acute, glabrous; style slender. — Proc. Am. Acad. 6.520. Sierra 

 Nevada {Brewer). 



-»- -i- Plovvers white: leaves (mostly very small) entire or rarely few-toothed : 



scapes rarely with a single leaf. 



18. D. nivalis, Liljeblad. Caudex with numerous slender matted branches : 

 leaves oblanceolate, acutish, entire, with a stoutish midnerve, canescent with 

 short dense stellate pubescence, ciliate near the base if at all : scapes and calyx 

 pubescent : pods few on short pedicels, usually glabrous, oblong, acute at each 

 end ; style short, stout ; stigma 2-lobed. — D. muricella, Wahl. D. stellata, var. 

 nivalis, Regel. From Greenland and the Arctic coast to Labrador, Colorado, 

 northern Utah and Nevada, and British Columbia. Iceland, Spitzbergen, and 

 northern Europe. Flowers sometimes slightly tinged with yellow. 



Var. elongata. Leaves obtuse or acutish : scapes very slender : pods 

 long (4 to 8 lines) and narrow, on rather longer pedicels. — D. Icevipes, Hook. ? 

 Rocky Mountains, from British America to Wyoming and the Uintas ; Mt. 

 Adams. 



19. D. subsessilis, Watson. See page 255. 



20. D. Fladnizensis, Wulf. Leaves more loosely rosulate, narrowly ob- 

 lanceolate, usually acute, entire, pilose-ciliate, usually sparsely villous or 

 somewhat stellate-pubescent, rarely wholly glabrous : scapes usually gla- 

 brous ; racemes short : petals often yellowish : pods glabrous, ovate-oblong 

 or ovate, on short pedicels ; stigma nearly sessile. — D. androsacea and D. 

 Lapponica, Willd. D. lactea, Adams. D. Wahlenbergii, Hartm. Greenland to 

 the lower St. Lawrence, and in the Rocky Mountains to Colorado. Europe and 

 Asia. 



Var. cortmbosa. Leaves occasionally toothed, ciliate and subpubescent : 

 scapes and sepals usually pubescent : pods stellate-pubescent ; style very short. 

 — D. corymbosa, R. Br. Greenland and perhaps (the original specimens) the 

 west coast of Baffin's Bay. Many of the specimens from Greenland and those 

 from Spitzbergen that have been placed here appear to belong, some to 

 D. alpina and others to D. hirta. 



