142 X. CRUCiFEH^. (Hook. f. & T. Anderson.)" [Braha. 



Sect. I. Aizopsis. Eootstock stout, with many crowded tufts of 

 rosulate leaves, which are rigid, ciliate, with a stout midrib beneath. 



1. D. ^laclalls, Adams in Mem. Soc. Rat. Jl/bsc. v. 106 ; leaves linear, 

 scapes naked, flowers yellow, pods tjvisted, style distinct. DG. Prodr. i. 

 167 : H. f. & T. Joum. Linn. Soc. v. 150. D. setosa, Koyle III. 71. D. 

 elegans, Boiss. Fl. Orient, i. 300. 



Western Tibet and Khnawdk, alt. 10-15,000 ft.— Disteie. Arctic Asia and Ame. 

 rica, Soongaria, Eocky Mts. 



Root siender, woody ; branches many, prostrate, tufted, covered below with withered 

 leaves. Leaves densely tutted, rather rigid, entire, rough and ciliated. Scapes^ 1-5 in., 

 numerous, erect, stiff, ^'lowers crowded near the summit of the scape. Pedicels and 

 calyx glabrous. Pods J-J in., erect, ovate-lanceolate, acute, glabrous. — Scarcely dis- 

 tinct from D. alpina, L. 



Sect. II. Chrysodraba. Boot or rootstock stout, with many crowded 

 tufts of leaves. Leaves not rigid, without a strong midrib beneath, setose or 

 tomentose. Flowers yellow. 



2. D. alpina, Linn. ; perennial, leaves densely rosulate oblong spathu- 

 late or lanceolate, scape leafless or 1-leaved, pods elliptic glabrous straight. 

 H.f. & T. Joum. Linn. Soc. v. 150. 1). radicans, Jioi/le III. 71. D. alpicola, 

 Klotzsch in Reise Fr. Waldem. 128, t. 36, f. 1 (bad). (D. algida, Adams; 

 Adamsii, Led. ; ochroleuca. Blunge ; polytricha, Led.) 



Alpine Himalaya, from Sikkim to Kashmir and in Westerk Tibet, alt. 12-17,000 ft. 

 — DisTRiB. Alps of W. Asia, N. Europe, the Rocky iMts. and Arctic regions. 



Stems densely tufted, short or 6-10 in. Leaves J-l in., covered with mix«d simple 

 and branched hairs, or glabrous with ciliate margins. Scapes J-6 in., 1-1 -flowered; 

 Flowers rather large, subeapitate. Sepals usually glabrous. Pods i— J in., shortly 

 racemose, 4^10-seeded; pedicels suberect, hairy or glabrous, long; style very short. 



3. D> elata, S.f. & T. Joum. Linn. Soc. v. 150 ; annual, leaves loosely 

 rosulate spathulate obtuse, scapes with distant leaves, pods ovate- or 

 oblong-lanceolate acute twisted. 



Subalpine inner ranges of Sikkim, alt. 11-13,000 ft., H. f. 



Erect, 9-15 in., sparingly covered with simple and stellate 'hairs. Radical leaves 

 petioled, entire or rarely toothed. Flowers numerous, subeapitate. Sepals J in., hairy, 

 margin scarious. Petals twice as long, ovate-oblong, clawed. Pnds in long lax racemes, 

 once or twice twisted, glabrous when ripe ; pedicels 4 in., spreading or suberect, pilose, 

 lower often bracteate. 



4. D. incompta, Steven in Bull. Soc. Nat. Hisl. Moac. iii. 268 ; peren- 

 nial, leaves rosulate oblong, scapes naked, pod elliptic-oblong slightly 

 curved not twisted. DC. Prodr. i. 168 ; Deless. Ic. ii. 44. D. tibetica, 

 va/r. y Winterbottomi, H.f. <jc T. in Joum. Linn. Soc. v. 152. 



Webtebu Tibet, alt. 11-13,000 ft.. Falconer, Winterhottom.—Dis,TRm. Persia, 

 Caucasus. 



A small very tomentose, hoary plant, with short naked branches from the crown of 

 the root, ending in tufts of leaves. Leaves \-\ in., all tufted, oblong. Scapes {-{ in., 

 pubescent, scarcely lengthening in fruit. Pods glabrous ; style short, bent or straight. 

 — The fruit of this plant was unknown when it was referred as a variety to D. tibetica; 

 those of B^alooner's specimens recently added to the Kew Herbarium have ripe pods, 

 which are similar to those of the Persian and Caucasian plant. 



Sect. III. Iieucodraba. Rootsioch biennial or perennial, with many 

 tufts of radical leaves. Leaves soft, flat. Floisers white. 



