142 



X. CRUCiFERji:. (Hook. f. & T. Anderson.) 



[Drflia; 



. Sect. I. Alzopsls. RootstocJc stout, with many crowded tufls <A 

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



1. I>. grlacialis, Adams in Mem. Soc, Nat, Mosq. v. 106 ; leaves Hnear, 

 scapes naked, flowers yellow, pods twisted, style distinct. DG. Prod)\l 



167 : H. 



D. setosa, Eoyle III. 71 



D. 



otss 



- f-Z-T' 



Western Tibet and Kunawar, alt. 10-15,000 ft. — Distrib. Arctic Asia and Ame- 

 rica, Soongaria, Eocky Mta, 



Boot slender, woody ; branches many, prostrate, tufted, covered below with withered 

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

 numerouB, erect, stiff. Flowers crowded near the summit of the scape. Pedicels and 

 c^^Z^x glabrous. Pods \-\m,^ erect, ovate-lanceolate, acute, glabrous. — Scarcely ai8- , 

 tinct from Z>. alpina, L. 



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

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

 tomentose. Flmvers yellow. : > v^5 



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

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

 //./. <t- T, Joum. Liim, Soc. v. 150. D. radicans, RoyU III 71. D. alpicola, 

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

 Adamsii, Led. ; ochroleuca, Bunge; polytricha. Led.) . ^^^ 



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

 -^DisTRin. Alps of W. Asia, N. Europe, the Rocky Mts. and Arctic repons. f 



Stems densely tufted, short or 6-10 in. Leaves J-1 in., covered with mixed simple 

 and branched hairs, or glabrous with ciliate marrins. Scales ^6 in., 1-10-flowered. 

 Flowers rather large, subcapitate. Sepals usually glabrous. Fods |-i in., shoiiiy 

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



3. D. elata, //./. <& T. Joum. Linn, Soc. v. 150 ; annual, leaves loosely 

 rosulate spathulate obtuse, scapes with distant leaves, pods ovate; o^ 

 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, 

 petioled, entire or rarely toothed. "' 



Radical leai^ei 



rarely toothed. Flowers numerous, subcapitate. Sejpals \ |0^ 

 hairy, margin scarious. Petals twice as long, ovate-oblong, clawed. Pods in long Jai 

 racemes, once or twice t\\'isted, glabrous when ripe; pedicels 4 in., spreading or ^^^ 

 erect, pilose, lower often bracteate. ^V J 



4. D- incompta, Steven in Bidl, Soc. Nat. Hist. Mosc. iii. 268 ; peren- 

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

 curved not twisted. LC. Prodr. i. 168 ; Ddess. Ic. ii. 44 ; D. tibetica, 

 var. y Wiuterbottomi, H.f. d: T. in Joum. Linn. Soc. v. 152. ^ ; 



Wksteun Tibet, alt. 11-1 3,000ft., Falconer, Winterlottom .—Dmt^i^' Persi*, 

 Caucasus. ^ 



A small very tomentose, hoary plant, with short nalced branches from the c^/*^. 

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

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



.r 



The fruit of this plant waS unknown when it was referred as a variety to P-f^^^J^ 

 those of Falconer's specimens recently added to the Kew Herbarium have ripe P^^ 

 which are similar to those of the PwnBian and Caucasian plant. ^ / 



-*. -. 



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. 1 : ^ J -^ 



.Skct, IV. Ziencodraba. 



ttifls of radical leaves. 



RootstocJc biennial or perennial, with in**' 

 Leaves soft, flat. Flowers white.^ ; 



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