898-1W2. No. 16.] FLOW. PLANTS AND FERNS OF N.-W. GREENLAND. 37 



Eriophorum Scheuchzeri Aira caespitosa 



polystachium Arctagrostis latifolia 



Festuca ovina Alopecurus alpinus 



Glyceria distans* Hierochloa alpina 



Poa glauca Lycopodium Selago 



cenisia Equisetum arvense 



Catabrosa algida Cystopteris fragilis 



Trisetum spicatum Woodsia glabella. 



All these are circumpolar species, even though some of them, those 

 marked with a "*" are absent from Spitsbergen. 



The Group I, 2, Carex glareosa and Glyceria angustata, not known 

 with certainty from the arctic coast of America, may yet be found there 

 and belong to the circumpolar, more or less ubiquitous plants; as is 

 also the case with Group I, 3: Drdba nivalis, Ranunculus pygmaeus, 

 Melandrium affine, Elyna Bellardi*, which are not yet collected in 

 the Arctic Archipelago but which will certainly be found there. Group 

 I, 4 contains 4 species, of which 3, Sagina intermedia, Carex ursina 

 and Glyceria Vahliana, as far as may be concluded from our present 

 knowledge of their distribution, will certainly yet be found in N. W. 

 Greenland and the Archipelago. Of the species as yet lacking in the 

 list of N. W. Greenland (Group I, 5), Erigeron uniflorus, Cardamine 

 pratensis, Carex capillaris*, Poa pratensis, Equisetum variegatum, 

 and Woodsia ilvensis*, will certainly be found there; the last species, 

 Carex ustulata, is, as far as our present knowledge goes, very spora- 

 dically distributed on the American side and especially in Greenland, but 

 is also circumpolar. 



Lastly we get from Group I, 6, two species, Arenaria ciliata and 

 Glyceria marilima, not yet reported from any arctic part of America 

 besides Ellesmereland, which must also go here as having been pro- 

 bably overlooked in the Archipelago and Arctic Coast as well as in 

 Asia. Thus we get from Group I, 68 species which are circumpolar 

 and mostly rather ubiquitous. In the following these will be designed 

 as Group U. 



We have still, however, 22 species of Group I left. Among these 

 the following 4 species from Gr. I, 1, decidedly have their home in 

 America: Erigeron compositus, Dryas integrifolia, Saxifraga tri- 

 cuspidata, Lesquerella arctica. To these may be added Arabis areni- 

 cola from Gr. I, 4. Alone of them, Dryas, goes over to the north- 

 eastern extremity of Asia. These species and some more mentioned 

 below, may form Group A. 



