The Flora of Greenland and its Origin. 



43 



via America, since on the European side, we have to go 

 right down into Central Europe, or still farther, to find 

 them. The remainder are high-arctic (Ai) or arctic (A2). 

 Of these, Polemoniam boreale is found only on the Kast 

 Coast, and must presumably have come from the east, 

 whereas Hesperis, Pedicularis lanata, Arctophila and Pucci- 

 nellia tenella are found only on the West (and North) coast, 

 and must naturally be supposed to have come from the 

 west. We have, then, in Group C, 4 + 4 westerly species 

 in all, and 1 easterly; the remainder are uncertain, and have 

 probably to a great extent immigrated prior to the maximum 

 of the ice age (glacial species). 



Group D comprises those species which are found both 

 in xAmerica and Europe (incl. Scandinavia), but are lacking 

 in Iceland. These number no fewer than 56, as under: 



I. Rubus chamæliiorus. 

 Carex polj'gania. 



— stylosa. 

 Galium trifloriim. V. 



II. Braj'a glabella. 

 Saxifraga hieraciifolia. 



III. Equisetum scirpoides. 



— silvaticum. 

 Sagina cæspitosa. 

 Ranunculus cymbalaria. 



— lapponicus. 

 Viola Selkirkii. 

 Linnæa borealis s. 1. 

 Andromeda polifolia. 

 Utricularia interniedia. 

 Calamagrostis Langsdorffii. 

 Vahlodea atropurpurea. 

 Liizula parviflora. VI. 



IV. Isoétes lacustre s. 1. 

 Botr^^chium boreale. 



— simplex. 



Cj'^stopteris montana. 

 Lycopodium complanatum. 

 Asplenium viride. 

 Draba crassifolia. 

 Ranunculus nivalis. 

 Antennaria alp. glabrata. 

 Arctostaphj'los alpina. 

 Rhododendron lapponicum. 

 Pedicularis lapponica. 

 Carex atrofusca. 



— rotundata. 



— scirpoidea. 

 Cobresia bipartita. 

 Agrostis borealis. 

 Calamagrostis arund. pur- 



purascens. 

 Luzula frigida. 

 Woodsia glabella. 

 Melandrj'um apetaluni. 



— pauciflorum. 



Stellaria longipes. 



I 



