NORTH-WEST MONGOLIA AND CHINESE DZUXUARIA. 405 



under the driest vegetative conditions ; southern Tannu-ola Mts., Achit Nor 

 basin, Snok Valley, and on the N. side of the Altai Mts. 



Distribvtion. N. Mongolia, Altai, and the Eocky Mts. of N. America. 



Erysimum altaicum, C. .1. ^JelJ., var. 7. humillimum, Ledeh. 

 No. 33. Dry desert hill-slopes and upland valley plateaus up to 2150 m., 

 Bodhon Valley, AV. Tannu-ola Mts. 



Distrihiition (of variety). North and West Mongolia and Dahuria. 



Erysimum cheiranthoides, Linn. 

 Distrihiition. Europe, N. Asia, and N. America. 



Lepidium LATiFOLiUM, Linn., var. affine, C. A. Meij. 

 No. 494. Driest hill-slopes and valley-bottoms, sandy and gravelly places, 

 Dja Kul and Djardan valleys. 



Distiibiilion. N. and E. Mongolia, and China. 



Raphanus sativus, Liun. 



No. 42. Cultivated in Chinese gardens, the root is eaten, Bogdo-ola. 

 Distribution. Wherever there is cultivation. 



VIOLACEiE. 



Viola altaica, Pall. 



No. 337. Rocky places on the White Mountain, Sayansk Mts., 1800 m. ; 

 also in meadows near rivers on well-drained land, Argaiak River. 



No. 365, flore albo. Marshy meadows up to 1200 m. (mid-season growth). 

 Upper Japsa, Shabash, and K and art systems. 



Distribution. Asia Minor, Turkestan, southern Siberia, and the Altai. 



Viola biflora, Linn. 



No. 360. Dry mountain summits, iSayansk Mts., Upper Kandart and 

 Japsa systems. 



Distribution. Europe, Turkestan, N.W. Mongolia, Kamtchatka, China 

 and Japan, extending southwards into northern Thibet. 



Viola canina, Linn. 



No. 266. Edges of cultivated land and shade of forests, Kushabar 

 Distribution. Northern temperate regions, extending southwards to 

 Kashmir and N. India. 



Viola unifloha, Linn. 



No. 262 b. Sayansk Mts. in Upper Kandart and Japsa systems. 



This is the typical plant as figured in Gmelin's ' Flora Sibirica,' tab. 48. 



fig- 5- 



Distriliution. Western and southern Siberia and northern Mongolia. 



LINN. JOURN. — BOTANY, VOL. XLI. 2 H 



