AD FLORAM INDICAM (CRUCIFER Xj. 143 



Distr. Persia ! Mesopotamia ! Asia minor ! 



Radix gracilis. Folia plurima, rosulata, £-f", submembranacea, obtusa, 

 pilosa, integerrima v. grosse paucidentata. Scapi seu caules 2-8, basi 

 curvi, dein erecti, sacpe flexuosi, 1-2", rigidi, glabri. Pedicelli breves, 

 •8~tY'» fructiferi incrassati, validi, patuli. Flores parvi, albi. Sepala 

 ajqualia, erecto-patentia, ovato-oblonga, obtusa, glaberrima. Petala 

 sepalis paulo longiora, anguste unguiculata ; lamina spathulata, ob- 

 tusa. Stamina sepalis asquilonga, filamentis subulatis liberis ; antheris 

 parvis, late oblongis. Ovarium teres, stigmate sessili. Siliqua recta 

 v. curva, compressissima, exacte linearis, obtusa, |-1?" longa. Valva; 

 venosse et costatae. Septum completum, enerve, subtilissimc lineis 

 tortuosis areolatum. Semina 1- v. 2-seriata, funiculi* elongatis ar- 

 cuatis liberis pendula, late oblonga, compresse punetulata. Cotyle- 

 dones oblongse, radicula oblique aecumbente. 



6. A. Thomson! (H.f.). Annua, e basi ramosa, foliis anguste lineari- 

 spatbulatis obovatisve sinuato-lobatis utrinque pilis stellatis laxis 

 eano-pubescentibus, caulinis petiolatis, floribus gracile pediccllatis, 

 siliquis patentibus falcatis (3" long., H" lat.) in stylum brevem acumi- 

 natis, valvis planis costa tenui, seminibus anguste alatis. 



Hab. In Himalaya oecidentali temperata, inter Kasbrnir et Dras, alt. 



9000-10000 ped. ! T.T. ; et in Tibetia oecidentali, Zanskar ! et Ladak ! 



alt. 10000-14000 ped., T. T. (fl. Jun.) 



I liave examined one good fruiting specimen, gathered by Dr. Thomson 



on his descent from Dras into Kashmir (29th Sept. 1848); and there are 



many others from Zanskar and Ladak which may belong to it or to the 



following, from which in the fruiting state it differs conspicuously in its 



much larger size, long curved pods, and broad winged seeds. 



7. A. Tibetica (H.f. Sf T.). E basi ramosissima, ramis divaricatis 

 prostratisve, foliis parvis obovato-spathulatis sinuato v. lyrato-lobatis 

 cano-pubescentibus subvillosisve, caulinis paucis petiolatis, siliquis 

 suberecto-patentibus angustis (1-2" long., T V" lat.) acuminatis, valvis 

 subtorulosis planiusculis nervo medio tenui, seminibus parvis oblongis 

 non alatis. 



?A. attenuata, Royle, Herb. 



Hab. In Tibetia occidental! temperata et alpina, alt. 10000-UiOOO ped. 



Zanskar ! Ladak ! Sassar ! Nubra ! T. T. ; Balti ! IVinterbottom, T. T. 



(fl. Jun.-Jul.) 



Very similar to Arabis petraia, Lam., but the whole plant is much more 



pubescent with stellate hairs, the pods narrower, longer, more acuminate 



and erect, and the flowers smaller. Also allied to A. Thomsoni; but the 



capsules are much shorter, narrower, and the seeds not margined. Also 



very similar to Sisymbrium humi/e, C. A. M. 



8. A. glandulosa (Kar. Sf Kir. En. Plant. Soong. 67; Led. Ft. Ross. 

 i. 750). Ilmnilis, sparse glandulosa, pilosa, foliis pinnatifido-lobatis, 



H2 



