Statistics of the Flora of the Northern States. 315 
‘ Northern limit, | Southern limit. | Range. 
Prunus serotina, - 61° 29° 32° 
ws Irginiana, = - 66 31 35 
Janda,* 2 69. 39 30 
Amelanchier Canadensis,* 66 30 36 
Cornus stolonifera, —- 69 38 31 
Viburnum acerifolium,* 62 31 81 
Aretostaphylos Uva-ursi,* 70 36 34 
Cassandra calyculata, 67 34 33 
Alnus viridis,*  - - 68 35 33 
Salix discolor,  - - 7 36 31 
“ lucida,* : 67 37 30 
“~ longifolia, : 68 35 33 
Populus tremuloides, - 69 37 32 
Abies nigra, = - 68 34 34 
Juniperus Virginiana, - 67 26 41 
Thave seen from Middle Florida are of doubtful character. 
Amelanchier Canadensis. The Shad-flower or Service- ITy 
Prefers the mountains or their vicinity, but is not unknown in 
some parts of the low country as far south as Florida. 
Prunus serotina. The Wild Black Cherry ranges from near 
Great Slave Lake, at the north, well into Florida and Texas, and 
Into the adjacent parts of Mexico. Although it varies from a 
moderate-sized shrub to a large tree, I have no idea that more 
one species is covered by this name. 
nus Virginiana. The Choke Cherry extends from the 
borders of the Arctic Circle to Louisiana, &c.; but in the South- 
ern States it is chiefly restricted to elevated districts. _ 
untperus Virginiana. The Red Cedar, with its immense 
Tange, in the United States inhabits the warmer rather than the 
colder districts of the country, and extends on the Gulf of Mex- 
1€0 quite to the mouth of the Rio Grande. As a tree it does not 
Secur north of about lat. 54°, but the low and oad es ros- 
, of Kurop 
this case ranges over nearly the whole extent of the northern 
: hemisph 07 
