100 RYDBERG: PHY APHICAL NOTES 
NORTHERN AND SOUTHERN ROCKIES 
Bistorta linearifolia B. bistortoides, glacial 
Acomastylis turbinata A. Rossii, arctic 
Acomastylis sericea A. Rossit, arctic 
Mertensia nivalis M. lanceolata, glacial 
Castilleja occidentalis C. pallida, arctic 
Many of the alpine plants of the Rockies have their nearest 
relatives among the subalpine or mountain plants of the region. 
Such are 
NORTHERN ROCKIES 
ALPINE SUBALPINE 
Potentilla perdissecta P. diversifolia 
Potentilla decurrens P. diversifolia 
Pseudocymopterus Tiedestromii P. montanus 
Bupleurum purpureum B. americanum (related to B. 
ranunculoides of Europe) 
Phacelia alpina P. heterophylla 
SOUTHERN ROCKIES 
Avena Mortoniana A. americana 
Poa Pattersonii P. crocata 
Eniogonum xanthum E. flavum 
Aquilegia saximontana A. brevistyla 
Thlaspi coloradense T. glaucum (also closely related to 
T. alpestre of Europe) 
Thlaspi purpurascens T. glaucum (also closely related to 
: T. alpestre of Europe) 
Cheirinia amoena C. Wheeleri 
Cheirinia nivalis C. Wheeler 
Cheirinia radiata C. asperrima 
Aragallus foliolosus A. reflexus 
Primula angustifolia P. Broadheadae 
Phlox condensata P. caespitosa 
* Mertensia Bakeri t 
* Mertensia lateriflora | 
*Mertensia Parryi ths onceclata 
* Mertensia viridula 
Besseya alpina B. plantaginifolia 
Achillea subalpina A. lanulosa 
ir abntets Atta ESTO a apes noctonee: : 
+ Those marked with braces constitute groups of close’y relat d species. 
