356 



Rydberg: Phytogeographical notes 



2. Endemic species, common to the Northern and Southern 



Rockies 

 The endemic element, which extends over the whole Rockies, 

 but has not invaded the Cascades, is much larger, but it does not 

 include any of the forest trees and only a few shrubs. It consists 

 of the following species: 



Shrubs 

 '\Salix petrophila Rihes parvidum 



t " saximontana ]Vaccinium oreophilum 



" hr achy car pa " scoparium 



Potamogeton interior 

 Stipa Tweedyi 

 " minor 

 ' ' Nelsonii 

 Deschampsia ctirtijolia 

 Poa Olneyi 

 " Buckleyana 

 " epilis 

 ' ' laevigata 

 Bromiis Porteri 



" PumpeUianus 

 Festuca ingrata 

 Agropyrum andinum 

 " Scribneri 



Carex pseudoscirpoidea 

 f " alhonigra 

 f ' ' chalciolepis 

 t " scopidorum 

 t " chimaphila 

 Allium hrevistylum 

 Disporum tr achy car pum* 

 Ophrys borealis 

 Eriogonum flavum 

 Bistorta linearifolia 



Herbs 



^Claytonia megarrhiza 

 \Oreobroma pygmaea 



Alsine strictifloraX 



Cerastium scopidorum 

 " strictum 



^Alsinopsis propinqua 

 t " obtusiloba 



Silene Douglasii 

 " Menziesii 

 ] Anemone zephyr a 



Thalictrum venulosum 



Atragene tenuiloba 

 ^Ranunculus affinis 

 f ' ' eximius 



" alpeophilus 



Aquilegia caeridea 



Thlaspi glauciim 

 ]Smelowskia americana 



Radicida alpina 

 \Draba andina 

 " crassa 

 ]Clementsia rhodantha 



Heuchera parviflora 

 \Saxifraga debilis 



* East to Manitoba and the Black Hills. 

 X East to Quebec. 



