DR. HOOKER ON THE DISTRIBUTION OF ARCTIC PLANTS. 3 15 
Beckmannia erucceformis, Host. The distribution of this plant is most extraordinary : 
in Europe it is absent in the whole north, west, and central area, but extends from N. 
Italy to Middle Uussia through Greece. In Asia it is found in Mesopotamia, Persia, 
Caucasus, Siberia, N.E. Asia, and Japan. In America it inhabits the whole west coast 
from Oregon to California, the Rocky Mountains, the Saskatchewan, and passes down the 
Mackenzie to beyond the arctic circle. It is absent in the ZS'orth and Central United 
States, but was found at St. Louis by Drummond. It is omitted in * Flora Boreali- Ame- 
ricana. 1 
Agrostis alpina, Wahl. The alpina of Scopoli is kept distinct by Griscbneh. Fries 
includes a Lapland plant of Villars's of that name under ritpestris, All., as Lapponinn. 
Andersson reduces alpina, Wahl., to rubra, and observes that it is a very northern 
plant, hardly known out of Scandinavia. I follow Munro in bringing aljt'nm under 
rubra, L., though I must confess I do not see why in that case A. ntpestris, All., 
should not follow. The true A. alpina of Scopoli, said to have been onec found on the 
Loffoden Islands, is excluded by Andersson. The true A. rupestris, All., according to 
Blytt and Andersson, is not Scandinavian. 
A. alba, L. I follow Munro in uniting this {polymorpha, Huds.,) with vulgaris. 
Grisebach keeps it distinct. 
Deyeuxia and Calamagrostis. I have implicitly followed Munro in these genera, 
being quite unable to arrive at any satisfactory conclusion regarding them. 
D. Canadensis, P. B. Durand is the only authority for this being a South Greenland 
plant ; but as he does not mention varia, strigosa, or lanceolata (all reputed Greenland 
plants), I hesitate to admit it. 
D. neglecta, Rupr. and Ehr., is a synonym of stricta, according to Grisebach, Fries, and 
Andersson. It is kept distinct from Lapponica by all. 
D. chalybcea, Fries, is kept distinct by its author and Andersson, who observes of it, 
" C. Lapponica siniillima, sed non parum diversa." It is the Lapponica /3. clmlybaa 
of Laestad. 
-#. purpurascens, Br. Asa Gray refers this doubtfully to sylvatica, PC. (Manual Bot. 
N. TJ. S.) ; Torrey more confidently (see * Flor. Bor.-Am.'). 
D. Grcenlandica, E. M. Tins is one of Kunth's unknown species (Agrost. 239) re- 
ferred here by Col. Munro. It is not referred to in Lange's Greenland list. It is 
also a Labrador plant, according to E. Meyer. 
D. montana. Host., is the Anmdo varia of Wahlenberg. Fries gives the Baltic Islands 
but Fr 
as its only Scandinavian habitat. 
D. Kartmanniana, Fr., is kept distinct by Andersson and Grisebach ; 
siders it insufficiently established. Andersson says of it, '< pulcherrima species inter 
Kallerianam et sylvaticam fere media ;" he places it next strigosa-. I follow Munro 
in bringing it under varia. . ... 
Z>. aleutica, Bong. Kept up by Grisebach ; but Col. Munro considers it identical with 
strigosa. 
V- Langsdorffii, Tr. Kept up by Grisebach, but considered by Munro the same with 
purpurea. 
