1 35] 



FLORA OF BOULDER, COLORADO 



37 



tane forest: Eriogonum subalpinum, Arnica Parryi, and Sene- 

 cio atratus. A large number of the montane sylvan species 

 were observed. 



b. Amnicolae. The subalpine stream vegetation is very 

 luxuriant. It has on the one hand a very close affinity with 

 the montane stream vegetation, and on the other with that of 

 the wet alpine tundra. Not only does the snow linger late in 

 these high valleys, the water of the streams is also very cold. 

 In the list that follows the montane species are included as 

 well : 



Poa platyphylla 

 P. alpina 

 Carex Goodenovii 

 Populus balsamifera 

 P. angustifolia 

 Salix caudata 

 S. Scouleriana 

 Retula fontinalis 

 Alnus tenuifolia 

 Bistorta bistortioides 

 Alsine Baicalensis 

 Caltha leptosepala 

 Trollius albiflorus 

 Anemone Canadensis 

 Ranunculus reptans 

 R. inamoenus 

 R. micropetalus 



Cardamine cordifolia 

 C. incana 



Clementsia rhodantha 

 Pectianthia pentandra 

 Micranthes arguta 

 Parnassia fimbriata 

 Sidalcea Candida 

 Oxypolis Fendleri 

 Primula Parryi 

 Swertia pali'Stris 

 Polemonium robustum 

 Mertensia polyphylla 

 Mimulus Langsdorfii 

 M. puberulus 



Helianthella quinquenervis 

 Senecio triangularis 



I am almost wholly unacquainted with the remaining sub- 

 alpine formations, such as the lacustrine, palustrous, rupes- 

 trine, the subalpine summit and high ridge floras. I saw a 



