VEGETATION OF BRAZOS CANYON 



L83 



cus, Vaccinium oreophilum, Atragene pseudoalpina, Odostemon 

 repens, Pachistima myrsinites, Lepargyrea canadensis, and Junip- 

 erus sibirica. The last is frequent on the rock slides and extent Is 

 well down into the Transition. 



This zone is rich in herbaceous vegetation and many of the 

 most interesting plants of the region occur here. In aspen 

 groves and on slopes among the coniferous trees the following 

 are characteristic: Pteridium aquilinum pubescens, Pyrola picta, 

 P. secunda, and P. chlorantha, Erigeron superbus, Pedicularis 

 grayi, Oreochrysum parryi, Anthopogon barbcllatus, Dasystephana 



Fig. 1. Along the Brazos. The trees are Douglas spruce, with a few aspens. 



parryi, Silene menziesii, Anticlea elegans, Artemisia franserioides, 

 Peramium menziesii, Antennaria microphylla, Caloehortus gun- 

 nisonii, and Thermopsis pinetorum. In crevices of the cliffs 

 inside the canyon and on the rock heaps at their base the follow- 

 ing are common: Senecio pagosanus and S. taraxacoides , Rhddiola 

 polygama, Draba helleriana, Erigeron leiomeris, Oxyria digyna, 

 Cerastium scopulorum, Scrophularia montana, Rubacer parvi- 

 florus, Heuchera rubescens, Ionoxalis violacea, P seudocymopterus 

 anisatus, Leptasea austromontana , Poteniilla concinna, Primula 

 (ingustifolia, and Cryptogramma acrosticholdes. 



