Druba. CRrciFKlLK. HI 



simple or branched ; stems hrancliing frum the liasu iipward, very leafy, 2 to fi iiiches hi;;h : 

 leaves obloiig-ohlauceulate, obtiisisli, entire, about half iiiili loiif^ or less : ll(jwern pah- y<-llow : 

 sepals pubescent: puds lanceolate to broadly olilong, acute or obtuse, jiuU-srcnt, nnub ror- 

 rugated and twisted, 2 to 5 lines long not inchiding tlie very slender style (a line ..r more 

 long) whicli is attenuate to a minute stigma: pedicels I to 3 lines long. — Mt. tJrevback 

 in the San Bernardino Mountains, f.emmon, W. (J. Wriijltt. 

 -I— -t— Flowers white. 

 ■H- Stems simple or sparingly branched. 

 = Cauline leaves several (or few in I), /intnri). 

 D. incana, l^. stellate pube.-«ont tliroughout; pubescence usually loose: caudex often 

 simple; stem 2 to 1;") inches higli : leaves mostly oblancecdate or the cauline sometimes 

 ovate, few-toothed or entire : pods oblong to lanceolate, usually acute and straight, glabrous 

 or finely .stellate-pubescent, 3 to 5 lines long, usually suberect on a.sceiiding pedicels I to 3 

 lines long; .style very short. — Spec. ii. 643. D. contorta, Ehrh. IJeitr. vii. l.'iS. I). rn„/,im, 

 Ehrh. 1. c., the form with pubescent pods. — Labrador to New Brunswick anil N. \'ermont ; 

 in the Kocky Mountains inlat. 51°, and in Cidorado at (ieorgetown. < i' ntui: , -.mil South I'ark, 

 Rothrock & \Vi>lf; at Ft. Eraser anil McLeod's Lake, Brit. Columliia, Mnronu. Some of the 

 western specimens are more fijiely and densely pubescent than is usual, ((ireenland, Ku., 

 Asia.) 



Var. arabisans, AVatson. Caudex mudi branched : jiod glabron.s acuminate or 

 acute, often twisteil, 4 to 6 lines long, beaked with a longer distinct stvle. — I'roc. Am. 

 Acad, xxiii. 260, & in Gray, Man. ed. 6, 67. D. araliisaiis, Michx. Fl. ii. 28; Crav, (Jen. 111. 

 i. 160, t. 68. D. Arabis, I'ers. Syn. ii. 190. D. ylabelln, I'ursh, Fl. ii. 434. />. inmwt, var. 

 glabriuscula, Gray, Ann. N. Y. Lye. iii. 222. D. Ihimfluiui, Schlecht. Linna'a, x. U»0. 

 D. Canadensis, Brunet, PI. Canad. 21, a form with ovate pods. — Labrador to N. \'ermont 

 and New York, an<l the shores of Lakes Huron and Superior. Grading indefinitely into the 

 typical form of the species. 



D. Breweri, AVatson, 1. c. Dwarf and alpine, hoary throughout with a dense stellate 

 pubescence; the few stems from a shortly branched caudex, 1 to 3 inches high: leaves 

 crowded, oblong to linear-oblong, obtuse, entire or rarely s])aringly toothed, sometimes 

 slightly ciliate at base, 2 to 4 lines long; the cauline few, oidong-ovate; tlowers small: 

 sepals oblong, herbaceous, shorter than the petals : pods linear-oblong, obtusish, pulie.xcent, 

 2 or 3 lines long, on short ascending pedicels: stigma sessile or nearly .so. — Mt. Dana, 

 California, at 12,000 feet alt., Brewer; White Mountains, Mono County, at 13,000 feet alt , 

 Shocl-leij. 



D. borealis, DC. Loo.sely stellate-pubescent throughout, more or le.«s cespitose; stems 

 2 to 12 inches high: leaves ovate to oblong-ovate, flat, glabrous or pubescent. 3 to :^ lines 

 long, exceeding the pedicels ; style short and stout. — Syst. ii. 342. I). Unahsrhklitun. DC. 

 \. c. 350. D. incana, var. borealis, Torr. & Gray, Fl. i. 107. — Alaska and adjacent islands; 

 Brit. Columbia, /?o^/irw^; Arctic Coast, F;y7/iX/»« ; Ochotsk Sea, Wright. A variety with 

 longer pedicels is found in Japan (Z). Sarhalinensis, Schmidt). 

 = = Cauline leaves one to three. 



D. hirta, L. Loosely stellate-pubescent : caudex branched ; stems low, usually lax • leaves 

 narrow or the cauline ovate, | to 1 inch long or less, sometimes ciliate: ptvis oblong-lanceo- 

 late to oblong-ovate, glabrous or sparingly pubescent, often somewhat twisted, 3 to 5 lines 

 long, u.sually exceeding the short pedicels ; .style short and stout; stigma often 2dol)ed. — 

 Syst. ed. 10, 1127; Fl. Dan. t. 2422; Lange.Medd. GrnMi. iii. 42. I). riii>,stris, K. Br. in 

 Ait. f. Kew. ed. 2,iv. 91 ; Fl. Dan. t. 2421. P. nbhmgatn, \l. Br. in Ross, Voy. .\pp. 143 ; DC. 

 Syst. ii. 342. D. graciUs, Ledeb. Fl. Ho.ss. i. 152. — Alaska, Cape Tliomp.oon to I'nalaska; 

 the Arctic Coast to Bensselaer Harbor, Kane. (Greenland, N. Eu., and Asia.) 



Var. arctioa, Watson. Densely tufted and more densely ptibes<eiit : leave.-' short ; 

 the cauline ovate: pods pubescent. — IVoc. Am. Acad, xxiii. 2fitt. />. inT//V(i, Vahl, Fl. 

 Dan. t. 2294; Lange, 1. c. 43. — (^rinnell Land, (h->rhi. ((ireenland, Spifzbergen.) 

 ++ -H- Stems diffusely branched above. 



D. ramosissima, Desv. Thinly stellate-pubescent : canilex much branched ; stems slender, 

 a span high: leaves oblauceobite, laciniately toothed, acute, \\ to 2l inches long: raceme* 



