168 PHANEROGAMIC FLORA OF SPITZBERGEN: 
the other hand, is accessible to vessels in^ May as-far north as lat. 
19?:5 N., and the sounds are in June free from fixed ice. 
That the early disappearance of ice on the west coast favours vege- 
tation is evident from the fact that 20 species, all save one belonging 
to the North European flora, have been found on the west, which have 
never been met with on the north coast. The flora of the north coast 
has, on the other hand, 13 species which have not been found on the 
west, and 6 or 7 of which are known elsewhere only from Melville 
Island and the west of Parry Island, in North America. Nothing 
almost is known of the south and south-west coasts; but the relatively 
small difference between the number of species in the north and in the 
west, the increasing additions of southern species on the west, and the 
great climatic differences between the two districts, make it probable 
that many interesting southern species will yet be found in the south 
and south-west. 
The species peculiar to the west coast,—all of which, except Ranti- 
culus arcticus, are North European,—are :— 
Eutrema Edwardsii, R. Br. Taraxacum pal 
ustre, 
Cardamine pratensis, L. Nardosmia frigida, (Z.), Cass. 
Arabis alpina, Z. Polemonium pulchellum, Ledeb. 
Ranunculus glacialis, Z. ertensia maritima, 
Rich. Empetrum nigrum, 
. -Arenaria ciliata, L. Salix reticulata, .L 
Ammadenia peploides, em Carex pulla, Good. 
Potentilla maculata, Pou C. glareosa, 
Wig. 
lenium altórnifoliun, var. Calamagrostis neglecta, Ehrh. 
tetrandrum, Th., Fr. Dupontia psilosantha, Rupr. 
Arnica alpite; Murr. " 
Of the 80 western species, 76 are found along the whole extent of 
the coast between lat. 787-79:5? N., especially at Ice Sound, King's 
Bay, Cross Bay, and Magdalena Bay. 4 species are met with. only 
more to the south, viz. Eutrema Edwardsii, Empetrum nigrum, and 
Salix reticulata, at Bellsund, lat. 77-5? N., Vahl and C. Martins, and 
Ranunculus gne exclusively on He Sydkap, lat, 176°5° N, 
Keilhau. 
Of the 73 native plants, 60 are found also on the west. 
The 13 peculiar to the north are :— 
