R\T)BERG: PhYTOGEOGRAPHICAL NOTES 



347 



larger percentage are arctic-alpine, descending into the Subalpine 

 Zone. Among these plants there are no trees and only a few low 

 shrubs. 



Shrubs 



Chio genes hispidula 

 Vaccinium uliginosum 



\Salix pseudomyrsinites 

 Ribes hudsonianum 

 Andromeda polifolia 



Herbs 



^Eriophorum Chamissonis 

 ^Scirpus paucifiorus 

 t ' ' caespitosiis 

 ] Car ex capitata 

 " aenea 



Heleonastes 

 t " supina 

 deflexa 

 " Hassei 

 " livida 

 " vaginata 

 atratiformis 

 miliar is 

 scirpoidea 

 \Juncoides hyperboreum 

 Cypripedium passerinum 



\Ranimcidns hyperboreus 

 Drosera rotundifolia 

 Parnassia palustris 



t " Kotzebiiei 



]Saxifraga rivularis 

 A nthiphylla oppositijolia 

 Comarum palustre 

 Mertensia paniculata 

 Veronica sciitellata 



\Pinguicida vulgaris 

 Valeriana septentrionalis 

 Erigeron alpinus 



" unalaschkensis 

 " piirpureum 

 Senecio pauciflonis 



3. Transcontinental species -limited to the Canadian 



Rockies 

 Some of the transcontinental subarctic plants have not spread 

 at all south in the mountains and are found in the Rockies only at 

 an altitude where the Subarctic Zone covers the lowlands. In other 

 words, they are found only in the Canadian Rockies. These 

 plants are also found north of the arctic timberline. They are: 



]Rubus acaidis 



t " Chamaemorus 



\Ledum groenlandicum 



Shrubs 



^Cassiope tetragona 

 ^Vaccinum Vitis-Idaea 

 '\Oxy coccus Oxy coccus 



