AD FLOEAM INDICAM (CEUCIFEE-S). 151 



Hab. In Affghanistan ! Griffith ; Himalaya alpina tota ! et Tibetia occi- 

 dentali alpina ! alt. 12000-1/000 ped. copiosiss. (fl. Mai-Jul.) (v.v.) 



Distr. Norwegia ! Lapponia ! Siberia, mont. Altai et Ural ; Soongaria ! 

 America arctica ! Montibusque Scoj>ulosis ! 



An excessively variable plant, of which D. glacialis is a drier-country 

 form ; it abounds in all Arctic America, and is found in Norway, but not in 

 Central Europe or the Pyrenees. It clearly resembles an Asia Minor 

 species of Boissier, D. elegans ; and, I think, D. incompta, Stev., and D. 

 polytricha, Led., Caucasus, and D. algida, Adamsii, ami ochroleuca of Si- 

 beria, may all be referred to it. In the ' Flora Boreali -Americana ' it is 

 stated to vary with white flowers ; and this, I think, is also the case in the 

 Sikkim Himalaya, where if is impossible to distinguish forms of it from 

 D. Walilenbergii, Ilartm. 



§ 3. Leucodraba et Holarges. Radix biennis v. perennis, multiceps. Folia 

 mollia, plana, nee rigida nee carinata. Flores albi. 



6. D. incana (Linn.). Tota pilis simplicibus stellatisque cano-tomen- 

 tosa, scapis gracilibus foliosis simplicibus, foliis oblongis lanceolatis 

 spathulato-lanceolatisve acutis dentatis v. integerrimis, siliquis ellip- 

 ticis lanceolatisve acntis incanis pedicello longioribus. — Descript. ad 

 exempl. Himalaica. 



Hab. In Himalaya alpina tota, alt. 10000-17000 ped. ! et Tibetia occi- 

 dental! frequentissime ! (fl. Mai.-Jun.) (v.v.) 

 Distr. Europa tota arctica ! et alpina ! America boreali arctica ! alpina ! 



et antarctica ! Asia boreali ! et arctica ! 

 The pods are always small and hoary in the Himalayan forms, are race- 

 mose and elliptic or lanceolate, always longer than the pedicels. 



7. H. lasiophylla (Royle, III. p. 71). Omnibus D. incana sed magis 

 conferta, scapis brevioribus gracilioribus ssepius minus foliosis, foliis 

 molliter incano-tomentosis albis, siliquis brevioribus latioribus. 



D. glomerata, Royle, I. c. 



Hab. In Himalaya occidentali alpina, alt. 12000-1(5000 ped. ; Kunawur ! 



Royle, Jacq. ; Kumaon ! et Garwhal ! Strachey $,- Winterbottom ; et 



Tibetia occidentali alpina, alt. 15000-18000 ped. ! T. T., et orientali, 



alt. 17000 ped. ! J. D. H. (fl. vere.) (v.v.) 

 An vere ab D. stellata, DC, distincta ? Exemplaria siliquis capitatim 



confertis ad D. Walilenbergii tendunt. 



8. D. Wahlenbergii {Hart. Scand. ed. 2, p. Ml, fid. Led. Fl. Ross. i. 

 p. 150). Parvula, foliis glabris pilosisve lanceolatis, scapo tenui nudo 

 v. l-phyllo, siliquis parvis ellipticis capitatim confertis glabris ellip- 

 ticis v. lineari-lanceolatis, pedicellis patentibus, stylo brevissimo. 



o. homotricha. Led. 1. c. Foliis pectinato-ciliatis utrinque pilosis v. 



glabris, pflis omnibus simplicibus. — D. lactea, Kar. & Kir. ! En. PI. 



Soong. no. 80; Led. /. c. p. 755. 

 3. lieterotricka, Led. /. c. Foliis ciliatis, utrinque pilosis, pilis aids 



elongatis simjilicibus, aliis brevioribus stellatis. — 1). pygmeea, Tufc. ! 



