150 DE. HOOEEE AND DE. THOMSONS PE^CUESOEES 



Hab. In Affghanistan ad summum portarum Koshuk Pass, alt. 7300 

 ped. ! Griffith. 



Species valde singularis D. Aizoidi affinis, sed floribns albis. — Rhizoma 

 perpendiculare, divisum, crassit. digiti minoris, inferne crebre cicatri- 

 catum, superue fasciculo densissimo spinarum 1" long, e foliorum de- 

 lapsorum costis persistentibns formato terminatum. Folia subpolli- 

 caria, T \'' lat. Scapi robusti. Flores albi. Sepala late oblonga. 

 Petala ovata, unguiculata. Eilamenta gracilia. Antherce breves. 

 Ovarium lineari-oblongum, hispidissimum, stylo recto elongato, ovulis 

 ovatis paucis. 



3. D. glacialis, Adams (Hook. Fl. Bor. Am. i. 57). Folds rigidis 

 linearibus setoso-ciliatis, scapis nudis floribusque aureis subcapitatis 

 glaberrimis, siliquis racemosis glaberrimis pedicellis longioribus tortis 

 lanccolatisve acutis, stylo distincto. 



a. Siliqua ovato-lanceolata v. lanceolata. 



/3. Siliqua ovata. 



Hab. In Tibetia occidentali alpina et in Kunawar ! alt. 10000-15000 ped. 



Herb. Royle, Jacquemont. (fl. Jun.-Aug.) (v.v.) 

 Distr. Siberia et America arctica ! in Montibus Scopulosis ! 

 Mera forma D. alpina foliis rigidioribus angustioribus. 

 In the ' Flora Boreali-Americana ' these leaves are stated never to be 



ciliated ; but they become so in specimens from all countries. 



§ 2. Chrysodraba. Radix valida, multiceps. Folia non rigida, rosulata, 

 coriacea membranaceave, setosa tomentosave, costa subtus non promi- 

 nente. Flores aurei. 



4. D. elata (H. f. § T.). Pedalis, stellatim pilosula, foliis radica- 

 libus membranaceis petiolatis spathulatis obtusis subintegerrimis, 

 caulinis sessilibus lineari-oblongis dentatis, floribns subcapitatis, pedi- 

 cellis sepalis ovariisque pubescentibus, siliquis tortis longe racemosis 

 pedicellis elongatis brevioribus ovato- v. oblongo-lanceolatis glabratis 

 acutis, stylo brevi distincto. 



Hab. In Himalaya orientali subalpina, alt. 11000-13000 ped. ! J.D.H. 



(fl. Jul.) (v.v!) 

 Laxe cacspitosa. Caules simplices. Flores majusculi, pedicellis infe- 



rioribus ssepe bracteatis. Siliculce vetustiores bis terve tortse, £- 1" long- 



Valves plana;. — An forma gigantea D. alpince"? 



5. D. ali'INA (Linn.). Foliis dense rosulatis oblongis obovato-spathu- 

 latis lanceolatisve pilosis ciliatisve pilis ramosis simplicibusque, scapis 

 aphyllis, floribns subcapitatis, siliquis racemosis glabris ellipticis ob- 

 longisve stylo breviusculo. — An D. radicans, Royle, 111. p. 71 ? 



D. glacialis, Kar. & Kir. Plant. Alatau, No. 1208 (vix Adams), variat 

 foliis densius laxiusve rosulatis, \-\" long., acutis obtusisve, scapis 

 (rarissiinc 1-foliatis) pedicellisque pubescenti-pilosis glaberrimisve. 

 1-10-floris, foliis vix longioribus ad 10'' long. 



