DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 
271 
The Arctic Greenland flora contains 206 species, according to Langc's catalogue (in 
Rincke's ■ Greenland ') ; or 207, according to my materials ( Monocot - 67 \ =1 
VDicot. . 140 
proportion of genera to species being 1:2. 
Of these 207 species the following 11 alone are not European : 
:2l): 
the 
Anemone Richardsonii (Asiatic). 
Turritis mollis (Asiatic). 
Vesicaria arctica (American only). 
Draba aurea (Rocky Mts. and Labrador only) 
Hesperis Pallasii (Asia and America). 
Arenaria Graenlandica (Mts. of U. S.). 
Potentilla tridentata (Labrador only). 
Saxifraga triscuspidata (Labrador only) 
Erigeron compositus (American only). 
Pedicularis euphrasioides (Asia). 
Salix arctica (Asia). 
On the other hand, no less than 57 Arctic Greenland species are absent in Arctic East 
America, and the following 36 Arctic Europe and Greenland species are either absent in 
all parts of Eastern Temperate America, or are extremely local there : 
Arabis alpina (Labrador only). 
Lychnis alpina (do.). 
Lychnis dioica (absent). 
Spergula nivalis (do.). 
Arenaria uliginosa (absent). 
ciliata (do.). * 
Stellaria cerastioides (do.). 
Alchemilla alpina (do.). 
vulgaris (Labrador only). 
Sibbaldia procumbens (United States only). 
Rubus saxatilis (absent). 
Potentilla verna (Labrador only). 
Sedum villosum (absent). 
Saxifraga Cotyledon (Labrador and Rocky Moun- 
tains only). 
Galium saxatile (absent). 
Gnaphalium sylvaticum (Labrador only). 
supinum, L. (do. and White Mountains). 
Cassiopeia hypnoides (Labrador only). 
Phyllodoce taxifolia (do. and White Mountains) 
Gentiana nivalis (Labrador only). 
Thymus serpyllum (absent). 
Veronica alpina (White Mountains only). 
saxatilis (absent). 
Euphrasia officinalis (N. U. States). 
Bartsia alpina (Labrador only). 
Rumex acetosella (absent). 
Salix Arbuscula (do.). 
Peristylus albidus (do.). 
Carex capitata (White Mountains only). 
microglochin (absent). 
microstachya (do.), 
pedata (do.). 
Elyna caricina (Rocky Mountains only). 
Phleum alpinum (Labrador and White Moun- 
tains only). 
Calamagrostis lanceolata (Labrador only). 
Deschampsia alpina (absent). 
When it is considered how extremely common most of these plants are throu 
Europe and Northern Asia, and that some 
abse 
some of them inhabit also N.W. America, their 
Eastern America is even more remarkable than their presence in Greenland. 
Another singular feature of both Arctic and Temperate Greenland is its wanting 
follow 
number of Arctic plants which 
Europ 
and found also 
America 
The 
ing is a list of most of these, excluding about 15, which are water-plants, or 
species whose range is limited. 
Icelandic, and I have introduced it to 
The letter I. placed before a species 
signifies 
that it is 
not only how many are absent from this 
island also, but how many are present. The letter S. indicates that the species is found 
in the south temperate or antarctic circle. The asterisk * indicates that the species is 
arctic both in East America and Europe. 
