RYDBERG: PHYTOGEOGRAPHICAL NOTES 309 
Linum Lewtsit Achillea lanulosa 
Circaea pacifica* Artemisia frigida (Asia) 
Glycosma occidentalis Arnica cordifolia 
Chimaphila occidentalis Senecio pseudaureus 
Pyrola picta Hieracium albiflorum 
Pierospora Andromedea Athyrium alpestre (Eur.) 
Androsace filiformis (Asia) Athyrium cyclosorum (Eur.) 
Polemonium occidentale Cryptogramma densa 
Collinsia parviflora Polypodium hesperium 
Pedicularis racemosa 
Cryptogramma densa, Athyrium alpestre,and Osmorrhiza obtusa 
reappear eastward on the Gaspé Peninsula, Quebec. When their 
distribution in Canada becomes better known, they may prove 
to belong among the transcontinental plants. Thalictrum sparsi- 
florum extends east to the Hudson Bay, Elymus glaucus to Upper 
Michigan, and Collinsia parviflora and Achillea lanulosa to western 
Ontario; Echinopanax horridum is found near the shores of Lake 
Superior. 
b. Water and bog plants 
In this class have also been included many plants of the 
wetter meadows and copses; in other words, the class consists of 
plants which probably have spread along the watercourses. This 
means, in this case, mostly along the Columbia River and its 
tributaries, for the Frazer River drains mostly the Cascades and 
other ranges west of the Rockies. Only the headwaters of this 
stream are in the Rocky Mountains, though north of the region 
here considered and mainly within the Subarctic Zone. The 
Colorado of the West runs for hundreds of miles in a deep canyon, 
does not touch the Sierras, and therefore can play practically no 
Part in the distribution of the Montane plants. 
Shrubs 
Salix glaucops Kalmia microphylla 
Alnus tenuifolia 
Herbs 
Muhlenbergia comatat Agrostis grandis 
Muhlenbergia filiformis Agrostis asperifoliat 
