RYDBERG: PHYTOGEOGRAPHICAL NOTES 305 
3. SPECIES LIMITED TO THE CANADIAN ROCKIES 
. a. Forest species 
Carex aenea Coptis trifoliata (Eur.) 
Carex durifolia Thelypterts Phegopteris (Eur.) 
Cypripedium passerinum Dryopteris fragrans (Eur.) 
Lystas orbiculata Woodsia glabella (Eur.) 
Ophrys convallarioides Lycopodium alpinum (Eur.) 
Comandra livida 
b. Water and bog plants 
Herbs 
Eriophorum callitrix (Eur.) Carex militaris 
Eriophorum opacum (Eur.) Carex deflexa 
Scirpus pumilust Oxycoccus Oxycoccus (Eur.) 
Carex chordorrhiza Oxycoccus macrocar pus 
II. Species common to the Rockies and the Canadian Zone 
The plants common to the Rockies and to the Canadian Zone 
of the East consist either of eastern species, whose ranges extend 
west into the Rockies, or of Rocky Mountain species which have 
invaded the East. The distribution of the former in the Rockies - 
is very similar to that of the transcontinental species just treated. 
Some of them have followed the northern woods, others the 
watercourses across the plains. The distribution area of some 
reaches the Southern Rockies, while that of others stops in north- 
€rn Wyoming, in northern Montana, or in the Canadian Rockies. 
Among the Rocky Mountain species which have emigrated east, 
some have reached the Lake Superior region, while others are 
found as far east as the Gaspé Peninsula of Quebec. 
A. EasteERN SPECIES, EXTENDING SOUTH INTO THE SOUTHERN 
ROCKIES 
1. Plants of boreal-sylvan distribution 
a. Forest species 
Oryzopsis asperifolia Vagnera stellata 
Agrostis oreophila Coeloglossum bracteatum 
Cinna latifolia (Eur.) Peramium ophoides 
Carex Parryanat Corallorrhiza Corallorrhiza (Eur.) 
