Southeastern Washington and Adjacent Idaho. 105 



situations but likewise occurs abundantly on the thin soil of the 

 stony bottoms of intermittent streams. 



The Wet Meadow Associes 



The wet meadows occupy a zone lying intermediate in succes- 

 sion between the Eleocharis-Carex associes on the one hand and 

 the more mesophytic type of prairie on the other. As would be 

 anticipated, it shows all stages of the disappearance of relict 

 members of the Eleocharis-Carex community which it frequently 

 borders, as well as the invasion of the more mesophytic prairie 

 species. 



However, the community as a whole is well defined and is es- 

 pecially characterized by numerous socies. These wet meadows 

 often occupy considerable areas, especially near the mountains, 

 and under cultivation furnish an excellent yield of timothy. 



Omitting relicts of earlier communities, and many species 

 found typically on moist hillsides, the following list gives the 

 principal wet meadow species : 



Species Forming Distinct Socies. 



Deschampsia caespitosa Quamasia quamash 



Hookera hyacinthina Ranunculus platyphyllus 



Heracleum lanatum Veratrum calif ornicum 



Iris missouriensis Wyethia amplexicaulis 

 Polygonum bistortoides 



Other Species. 



Calochortus nitidus Hypericum scouleri 



Car ex aperta Lupinus leucophyllus 



Castilleja miniata Mentha canadensis borealis 



Cicuta occidentalis Orthocarpus tenuifolius 



Cogswellia triternata Poa annua 



Delphinium simplex Poa triflora 



Epilobium adenocaulon Polygonum emersum 



Equisetum spp. Polygonum polygaloides 



Galium boreale Potentilla rectiformus 



Hordeum nodosum Prunella vulgaris lanceolata 



105 



