380 Statistics of the Flora of the Northern States. 
248 species, or over 144 per cent, range from the Gulf of 
Mexico to the Great Lakes or the St. Lawrence 
The twenty-four herbaceous plants of widest climatic range are 
Ranunculus aquatilis. Lupinus perennis (if the plant 
: ymbalaria. growing on the Arctic sea- 
oa urshii. coast is correctly referred to 
" sceleratus (a doubtful this species). | 
native southward). Galium trifidum. 
Sarracenia purpurea. “ — triflorum 
Nasturtium palustre. Erigeron Philadelphicum. 
Cardamine hirsuta. Achillea Millefolium (probably in- 
Barbarea vulgaris (not indigenous troduced southward). 
at the south /). Senecio aureus. 
Sisymbrium canescens. Taraxacum Dens-leonis. 
Viola cucullata. Dodecatheon Meadia. 
Drosera rotundifolia. Chenopodina maritima? 
Spergularia rubra. Potamogeton pectinatus. 
; Luzula campestri 
Carex Nove-Anglia. 
All except three or four of these species range westward to 
the Pacific; but one, Sarracenia purpurea, is remarkably re- 
stricted to the vicinity of the Atlantic. Only the seven printed in 
italics are indigenous to North America exclusively. 
above the average of indigenous species to genus. 
And our woody plants of wide range tend more strongly to 
this view, as the following table shows. 
Ss Ss soe us 
Of more than average;Of a single 
Wirsédis starts & Whole No. 
Woody Plants ranging through) o¢ species.|Of great size.|size, i.e. of over 10/cies or near 
species. ° : 
en, tails 
30°-40° of latitude. | 15 | 3 13 1 
+} 20° Mb th SOE: BS 20 48 6 
¥ : mat 57 i 7 44 sg etl 
ar? 140 80.° | ee Bs 
