Statistics of the Flora of the Northern States. 387 
tncana, Montia fontana, Saxifraga exarata, Hrigeron alpinum, Sta- 
tice Armeria, Carex festiva, and Alopecurus alpinus, enumerated — 
in Hooker’s Flora Antarctica, as both Arctic and Antarctic 
American as well as European species. 
2. Those which re-appear in Japan, the Himalaya, or some 
= of Northern Asia, but are not European; of which the fol- 
owing are the principal: viz, Brasenia pellata, Sium lineare, 
Ayplotenia Canadensis, Heracleum lanatum, Osmorhiza ngistylis, 
Aralia quinquejolia, Viburnum lantanoides, Monotropa uniflora, 
Phryma leptostachya, Smilacina trifolia, Trillium erectum, var., 
Camptosorus rhizophyllus, and Adiantum pedatum. A_ goodly 
number of species common to Northwestern America and Japan, 
and of others common to the Himalayas, Europe, and North 
America, although as yet known from but few stations through- 
out large parts of this belt (such as Spirea Aruncus, Pyrola ro- 
lundifolia, &c.,) and whose dispersion is scarcely more explicable 
n that of the foregoing by any existing agencies, serve nearly 
to bridge over the wide gap which, rst view, appears so 
markedly to separate these extraordinarily sundered plants from 
- emetility of species.* 
America, not reaching here to high latitudes, and mostly of lim- 
ited range on one or the other side of the Atlantic. Of this sort 
are Myosurus minimus (in this country remarkably southern, but 
also far western in range), Subularia aquatica, Circea Lutetiana, 
and on the other hand, Potentilla tridentata, Smilacina stellata, 
Vallisneria spiralis, Spiranthes cernua, Spartina stricta, ‘and Zrio- 
caulon septangulare, all common and for the most part rather 
Widely distributed plants in this country, but very | 
Europe. All but four species on this list belong exc usivel to 
the Atlantic border of North America. Cases of this kind are 
faturally regarded by some as indications of a former t 
Connection between North America and Europe. 
Only three or four of these species 0 
*On t of 49 speci ; these first and second heads, as mai as 10 i 
pee pecies belonging to ss f 
to i of less than ten good Species ;-—six of 
the cine Lad genera, and 21 bod eo ea ohal NY Poi 
be Carex ;—on the whole rather militati inst 
Test Sted gianna beng), Devore of species bears some proportion to the 
