217 



Hob. Urup ! (ex Ma x.) . 



Distrib. Arctic Europe, Asia and North America; in the alpine regions of central 

 Asia and western North America. 



17. Barbarea vulgaris, R. Br. Hort. Kew. ed. 2, i\\ p. L09; Ledeb. PL Ross. I, p. Ill; 



Regel, PI. Radd. r, p. 153; Torr. &Gray, PI. X. Am. i, p. 75; Pr. & Sav. Enum. 

 i, p. 32, ii, p. 278. 

 Hab. Etorofu, at Rubetsu. 



Distrib. Europe, northern and southern Africa, northern and temperate Asia to 

 Alaska and western North America. Naturalized in the eastern United States. 



18. Arabis Stelleri, D.C. Syst. II, p. 242; Ledeb. PI. Ross, i, p. 122.— Var. japonica, F. 



Schm. Fl. Sach. p. Ill; Fr. & Sav. Enum. i, p. 33, ir, p. 278. Arabis alpina (?), 

 \ nr. japonica, A. Gray, PI. Jap. p. 307. A. japonica, A. Gray, Hot. Jap. p. 381. 

 Hab. Etorofu, at Rubetsu. 



Distrib. Saghalin, northern and middle Japan, Corea, Manchuria, Kamtsehatka to 

 the Aleutian Islands. 



19. Arabis lyrata, L. Sp. p. 665; Torr. & Gray, Fl. N. Am. I, p. 81; DC. Prodr. I, p. 



146; A. Gray, PI. Jap. p. 307; Fr. & Sav. i, p. 33. 

 Hab. Shikotan, on rocky cliffs along the beach. 



Distrib. Middle and northern Japan, and in North America: Canada to Virginia and 

 Lake Superior, and westward in the Pacific regions, as var. occidentalis, Watson, MS. 

 {A. ambigua, DC, in part). 



20. Arabis ambigua, DC. Syst. u, p. 231; Ledeb. Fl. Ross. I, p. 120; Trautv. & Mey. 



Fl. Ochot. p. 14; Reg. & Til. Fl. Ajan. p. 46. A. hamtschatica, Fisch. in DC. 

 Syst. n, p. 231 (as A. lyrata, /?.) ; Ledeb. Fl. Ross, ir, p. 121. A. petrwa, (3-3, 

 Regel, PI. Radd. i, p. 1(5(5. 

 Hab. Kurile Islands (e^cDC). TJrup ! (ex Max.). 



Distrib. Ochotsk region, northeastern Manchuria, Saghalin, Kurile Islands and Kamt- 

 sehatka. 



Probably this plant does not differ from Dr. S. Watson's var. occidentalis of A. lyrata. 

 The specimens from Alaska and the Aleutian Islands, and also those which were collected 

 in Kamtsehatka by C. Wright, and which were variously referred to A. ambigua and 

 kamtscliatica, are all considered by Dr. Watson as belonging to his variety of A. lyrata. 



21. Arabis perfoliata, Lam. Diet, i, p. 219; Fr. & Sav. Enum. i, p. 34. TurHtis glabra, 



L. Sp. p. 666; Ledeb. Fl. Ross, i, p. 116. 

 Hab. Etorofu, at Arimoi. 



Distrib. Europe, temperate Asia, and N. America (W. and E.). 



22. Cardamine pratensis, L. Sp. p. 656; Ledeb. Fl. Ross. I, p. 125. — Var. prorepens, Max. 



Mel. Biol, ix, p. 6. C. prorepens, Fisch. in DC. Syst. ir, p. 256; Ledeb. I.e. n> 125. 

 Hab. Kurile Islands! (Herb. Fisch.) 



Distrib. Eastern Siberia, Dahuria, Manchuria, and Kurile Islands. 

 The species is circumpolar in its distribution. 



23. Draba hirsuta, Turcz. in Bull. Mosc. 1840, p. 64; Ledeb. Fl. Ross, i, p. 755. 

 Hab. Kurile Islands (ex Turcz.). 



