FLORA OP THE CASCADES 
151 
Pseudotsiiga mucronaita 
Sporoholus depauperatus 
Koeleria cristata 
Elymus condenscCtus 
Populus tremidoides 
Polygonum erectum 
Silene menziesii 
Geras tium sp. 
Bibes cereum 
PMladelphus lewisii 
Bosa pisocarpa 
Potentilla biennis 
Potentilla fastigiata 
Horkelia fusca 
Fragaria crinita 
DrymocaUis convallaria 
Lupinus minimus 
Lupinus laxiflorus 
Phaca pursh'ii 
Vida americana 
Lathy rus bijugatus sandbergii 
Linum digynum 
Viola sp'. 
Epilobium paniculatum 
Arctystaphylos manzanita 
Gilia pharnaceoides 
Gilia humilis 
Gollomia grandiflora 
Collomia linearis 
Phacelia linearis 
Crypianthe ambigiia 
Pentstemon conferfus 
Pentstemon collimis (f) 
Pentstemon sp.. 
Mimulus nanus 
Mimulus cusickii 
Symphoricarpos racemosus 
Ptiloria virgata 
Agoseris heterophylla normalis 
Eieracium griseum 
Solidago rhissouriensis 
Macherantliaera sp. 
Hemizonella durandi 
Achillea millefolium lanulosa 
Artemisia ludoviciana 
Senecia sp. 
Antennaria geyeri 
In this list of fifty-three species we find seven that have a very 
wide distribution, and eleven others that occur plentifully west 
of the Cascades, while several belong regularly to higher' zones. 
Here, then, the dry region element is seen to predominate. 
The fourth class, consisting of those species found mainly on 
very dry, stony hills, is necessarily more poorly" represented in 
our list than the others, since it contains a greater proportion 
of delicate, short-lived forms that had disappeared before our 
arrival. We find here : 
Juniperus occidentalis 
Agropyron spicatum 
Calochortus macrocarpus 
Eriogonum proliferum 
Eriogonum compositum 
Eriogonum umhellatum 
Silene sp. 
Thelypodium laciniat u m 
Conanthus parviflorus 
Lithospermum ruder ale 
Ghrysothamnus viscidiflorus 
G hrysothamnus pub erulus 
Ghrysothamnus nauseosus 
Townsendia florifer 
Erigeron poliospermu m 
Erigeron linearis 
