The Flora of Disko Island and Adjacent Coast of West Greenland. 83 



Normally the flower is pure white. On limecharged soii it becomes 

 lilac, almost as the European form. 



Hibernates covered by snow and often by ice. 



A 163. Arabis alpina L. (Incl. A. glabra A. Bl. Rowlee 



& WiEGAND). 



From the herb-mats, copses, springs, water-courses and moss-bogs 

 of the lowland ascending to the fell-field and moist edges of moraines. 

 Very common throughout the whole area. 



A southern type; the known north limit now lying at about 

 72°30'. Nevertheless in South Greenland more frequent in the coast 

 region than in the fertile part of the interior. 



Abundantly flowering and fruiting. 



Hibernates covered by snow. 



A 164. Arabis Holboelli Horn. {Turritis relrojracta (Hook.). 

 On sunny, not too dry slop'es. 



Disko: The south coast near Godhavn 69°15' from several piaces (several 

 coUectors, for instance, Holbøll); Mellemfjord 69°4"2' (Th. Fr.). 



Mainland: Tasiussarssuaq (Bg. ; BL); Christianshaab (Sor.); Jakobshavn 

 (Holbøll); Sarqaq about 70'' (V.). Common in the region of Holsteinsborg; espe- 

 cially in the Fjords. 



South of the area rather common till 64°, but south of this latitude 

 only a single specimen is known from about 61° (Ros.). 



In spite of this it must be stated as a decided southern type 

 according to its occurrence in America. 



Abundantly flowering and fruiting. 



Certainly always covered by snow during winter. 



I 165. Arabis Hookeri Lange (Turritis mollis Hook.). 



■ 



In favourably situated and rather moist piaces. Hare and local. 



Disko: Without locality recorded by Vail; not re-found. 



Mainland: Eqe 69°42' near the glacier (P.); X. Strømfjord: Amitsuarssuk 

 (Korn.?); Sånerut (Korn.); \. Isortoq (V.); the fjords inland from Holstemsborg: 

 numorous piaces (several coUectors). 



A northern type; south of tho area only observed in a few piaces, 

 the southmost at about 64°. North of the area extraordinary many 

 localities in the southmost part of Nordost-Bugt. Resides known from 

 the district of Cape York. 



Abundantly flowering and fruiting 



6* 



