The Flora of Disko Island and Adjacent Coast of West Greenland. 131 
Abundantly flowering, but the fructification is not good every year. 
Covered by snow during winter. 
A 227. Ledum groenlandicum. Oerp. 
On luxuriant not too dry heath, in mossy bogs and at the edges 
of willow thickets. 
Mainland: Near Holsteinsborg, 67°, and in the fjords inland from that place 
rather common (several collectors), 
It has sometimes been reported farther to the north on the mainland and also 
sometimes from the fjords of Disko. But although we have eagerly searched for it, 
we never succeded in finding it here. In the Herb. Haun, is a specimen from Egedes- 
minde 68°42’ (Sor.) (see list II1), but we doubt the correctness of the statement. 
We must, until new records have been made, consider the polar circle as its nothern 
limit in West Greenland. 
South of our area it becomes commoner, and it occurs down to the 
southmost Greenland and reaches to at least 60°10’ on the east coast. 
Hence a southern type. 
Principally a lowland plant. Abundantly flowering and — in the 
southmost habitats — also abundantly fructificating. 
Covered by thick layers of snow during winter. 
With the slight exception mentioned above no Ledum occurs on 
the whole coast of East Greenland. 
Outside Greenland no Ledum is known, neither from Iceland, 
Jan Mayen, Feroes nor the British Islands. In northern Norway and 
through the whole of Sweden occurs L.palustre. This species is sporadic 
in the lowland of Germany becoming commoner eastwards, rather con- 
tinually distributed from Servia through Hungary, Austria, Galicia, Po- 
land, eastern Baltic lands, Fennia to Lapland. Further it is common in 
temperate and boreal Russia and through the whole of northern Asia 
to Korea and northern Japan. In its whole area this species is a low- 
land plant and a continental species avoiding the arctic barrens north 
of the limit of the forests. Perhaps it enters the American continent in 
its western boreal part. What we saw from Arctic and Eastern North 
America belonged to L. decumbens. 
L. decumbens occupies the Arctic part of Asia, at least to Jenissei. 
It has sometimes been reported from Arctic Russia and the Kola penin- 
sula. What we saw from the northernmost localities of Europe was 
depauperate forms of the preceding. On Nova Zemlia and Spitsbergen 
no species of Ledum occurs. Further we consider the Ledum occurring in 
Northern America north of the area of L. groenlandicum to be this species. 
It ranges in the eastern part nearly up to the 70™ parallel of latitude 
9* 
