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TURESSON: SLOPE EXPOSURE AND PSEUDOTSUGA 339 
Aster oreganus 
Heracleum lanatum 
Impatiens biflora 
Mentha canadensis borealis 
Roripa Nasturtium 
Scutellaria lateriflora 
Senecio hydrophilus 
Solanum Dulcamara 
Stachys palustris 
Steironema ciliatum 
Higher up on the steep slope, where Pseudotsuga becomes 
dominant, the vegetation shows the following composition: 
TREES 
Pseudotsuga taxifolia 
Ceanothus sanguineus 
Opulaster pauciflorus 
Sambucus glauca 
Antennaria rosea 
Arnica cordifolia 
Campanula rotundifolia 
Castilleja miniata 
Claytonia linearis 
Claytonia perfoliata 
Claytonia sibirica 
Collinsia tenella 
Crepis barbigera 
Crepis gracilis 
Disporum majus 
Dodecatheon puberulum 
Drymocallis Convallaria 
Erigeron speciosus 
Erythronium grandiflorum 
Fragaria platypetala 
Galium A parine 
Galium boreale 
Gentiana oregana 
SHRUBS 
Schizonotus discolor 
Spiraea corymbosa 
HERBS 
Geranium viscossisimum 
Heuchera cylindrica 
Hieracium albiflorum 
Hieracium Scoulert 
Mertensia olbongifolia 
Pentstemon confertus 
Ranunculus glaberrimus 
Sedum stenopetalum 
Sieversia ciliata 
Silene Douglasii multicaulis 
Synthyris rubra 
Tellima parviflora 
Tellima tenella 
Trillium petiolatum 
Vagnera amplexicaulis 
Valerianella macrocera 
Vicia americana 
Viola adunca 
Viola retroscabra 
As easily seen, the herbaceous vegetation is made up of truly 
Transition or Arid Transition plants with one exception, Claytonta 
