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 
tSalix petrophila Ribes parvulum 
“*  saxtmontana | Vaccinium oreophilum 
“ brachycarpa " scoparium 
Potamogeton interior 
Stipa Tweed yi 
‘“* ‘minor 
Nelson 
Deschampsia curtifolia 
Poa Olneyi: 
“ Buckleyana 
* epilis 
“laevigata 
Bromus Porteri 
7 Pumpellianus 
Festuca ingrata 
Agropyrum andinum 
‘ec 
: Scribneri 
Coe pseudoscirpoidea ~ 
albonigra 
+ “ chalciolepis 
t “ — scopulorum 
t ‘  chimaphila 
Allium brevistylum 
Disporum trachycarpum* 
Obhrys borealis 
Eriogonum flavum 
Bistorta linearifolia 
* East to Manitoba and the Black Hills. 
t East to Quebec. 
Herbs 
+Claytonia megarrhiza 
tOreobroma pygmaea 
Alsine strictiflorat 
esheets scopulorum 
strictum 
tAlsinopsis propinqua 
4 obtusiloba 
nen Douglasi 
Menziesit 
tAnemone zephyra 
Thalictrum venulosum 
Atragene tenuiloba 
tRanunculus affinis 
eximius 
s alpeophilus 
Aquilegia caerulea 
Thlaspi glaucum 
tSmelowskia americana 
Radicula alpina 
tDraba andina 
> Ofass0 
tClementsia rhodantha 
Heuchera parviflora 
TSaxifraga debilis 
