The Flora of Disko Island and Adjacent Coast of West Greenland. 27 



All the mentioned localities are in the lowland. 



Mostly abundantly fruiting. 



Hibernates covered by thick layers of snow. 



X 12. Equisetum silvaticum L. 



A decided southern type, from 65^ and southwards rather com- 

 mon. N. of this latitiide it is recorded from Aulatsivikfjord 68^0' (Bg. ); 

 an islet in the Sydostbugt (Bg.); Imilik at the icefjord of Jakobshavn 

 69°10' (Sør.) and Disko at Godhavn (Walker). In all these piaces it 

 has been repeatedly sought in vain for by us, and it has never been found, 

 neither by the above mentioned collectors nor by us, at the heads of the 

 big fjords at Holsteinborg and north of it. The northmost specimens 

 in H. H. are from South Isortoq (65°20') and vicinity of Godthaab. 



I 13. Equisetum arvense L. 



In bogs, swamps, and heath; often inundated a great part of the 

 summer when growing on lakeshores. Also as undergrowth in rich herb- 

 mats and thickets. Often it forms extensive growths along the shores 

 of rivulets and lakes or in thickets. 



Very common throughout the whole area. 



Wide-spread species, probably without northern limit in Green- 

 land. Ascends undoubtedly to the snowline. Abundantly fruiting ex- 

 cept in the most humid piaces. 



Covered by snow and often by ice in winter, 



Varies very much in luxuriant piaces; in the southern part of the 

 land, especially in herb-mats and thickets, forms occur with. spikes 

 on the branching green shoots. 



IV. Lycopodiaceae. 



I 14. Lycopodium Selago L. 



In swampy heath and bogs, in herb-mats and willow-thickets 

 especially on organogenous soil, not on petrogenous. Very common 

 throughout the whole range. Wide-spread species, probably without 

 northern Hmit on the coast of Greenland. Ascends the hills as far as 

 the preceding vegetation has deposited sufficient mould, and is thus 

 not among the pioneers of piants. 



Varies according to the quality of the habitat; most common is 

 /. appressa Desv. the very branchy, yellow-green form with densely 

 appressed leaves. Hardly ever fruiting, but forming bulbiets in abundance 

 with great power of migration and germination. In vigorous heath, herb- 

 mats and copses less ramified forms occur with distant leaves, in appea- 

 rance and size quite similar to the main-species from the temperate 



