Phytogeography of the Arctic American Archipelago 
167 
Salix rehculata, and to tliese Saxifraga hieraciifolia can be added, as its area iu 
the northeast of that land is entirely unconnected with the ainerican one. Of the 
others some are southorn with different norlhern hmits, others again belong to the 
curious group of middle Greenland species which I shall have to come back to 
soon, and some even reach beyoud Melville Bay nortliward. 
The last geographic plantgroup in the Archipelago, now left to discuss is that 
of 34 species, restricted to tiie southeastern parts. As far as its distribution here is 
coneerneH, there is nothing curious about it, a few of the species are on the Con- 
tinent restricted to the eastern side, others show a wider range, but nothing pre- 
vents their being looked upon as immigrants via Labrador, some perliaps also along 
the western shore of Hudson Bay. They might be rather late arrivals, perhaps 
from the warm postglacial time, and their narrow range might be explained as 
caused by their claims on favourable chmatical conditions. But if we look upon 
their distribution in Greenland the problem becomes rather complicated. Only two 
are wanting in Greenland, viz., Salix chlorophylla and S. uva ursi, all the others 
reach from the neighbourhood of Cape Farewell more or less far north on the 
western coast, and most of theni range north ward along the east coast also. Some, 
however, are absent, as far as known, from the southernmost part of the east 
coast, to appear again farther north, and two, Atropis tenella and Calamagrostis 
lapponica, are wanting there. Curiously enoagh most of these species, stopping 
in Batfin Land at Cumberland Gulf, about the Arctic Circle, in western Greenland 
reach up to the Disco region, about 70^ or even to Melville Bay and beyond. Now 
even if the landcounection over Davis Strait is postulated to have existed still at a 
time late enough for these species to have arrived there and travelled over it — 
and that does not seem impossible — why have they not reached equally far north 
on the western side? This is a question which I am not able to find any answer to. 
There are, however, some other singular features in the composition of the 
Greenland flora which it may be advisable to mention here, even if they have no 
direct bearing upon the flora of the Arctic Archipelago. Firstly there are 24 spe- 
cies, all found in some part of America, which appear in single stations or along 
a more or less considerable stretch of the western coast of Greenland, without, 
however, reaching up to Melville Bay and showing a southern borderhne more or 
less far north ol Cape Farewell, notwithstauding they go considerably further south 
in other regions, for instance on the American Continent. And some of these, 
marked below with an *, appear again in a more or less corresponding situation on 
the east coast. These species are: 
'^^'^icta * * saxatilis Myriophyllnm spicatum 
Richardsotiii Catabrosa aquatica Pedicularis euphrasioides 
Cerastium arvense Potamogetoi 
Raminculus Cymbalaria 
» lapponicus 
*Tofieldia cocciuea 
