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UNIVERSITY OF MISSOURI STUDIES 



[176 



the mesa canon principally in the absence of the chaparral ele- 

 ment, the haws and wild plums being absent. Most of the re- 

 maining shrubs and arborescent plants are identical — the 

 dwarf maple, the birch, the dogwood, the beaked hazel, the 

 wild cherries, and the cottonwoods. The following are the 

 chief species: 



Equisetum laevigatum 



Cinna lati folia 



Avena striata 



Eatonia Pennsylvanica 



Poa triflora 



Panicularia nervata 



P. Holmii 



Carex tenella 



C. Hoodii 



C. festiva 



C. aurea 



Juncus Balticus montanus 



Juncoides parviflorum 



Allium Geyeri 



A. reticulatum 



Lilium Philadelphicum 



montanum 

 Vagnera stellata 

 Streptopus amplexifolius 

 Disporum majus 

 Limnorchis viridiflora 

 L. laxiflora 

 Ibidium Romanzoffianum 



strictum 

 Ophrys borealis 

 Acroanthes monophylla 



Populus Sargentii 

 P. angustifolia 

 Salix caudata 

 S. perrostrata 

 S. Bebbiana 

 Betula fontinalis 

 Alnus tenuifolia 

 Corylus rostrata 

 Crunocallis Chamissoi 

 Clematis ligusticifolia 

 Ranunculus reptans 

 R. abortivus 

 Thalictrum Fendleri 

 Thlaspi Nuttallii 

 T. Coloradense 

 Draba streptocarpa 

 Ribes Purpusi 

 Opulaster intermedius 

 O. Ramaleyi 

 O. glabratus 

 O. monogynus 

 Rubus triflorus 

 Fragaria bracteata 

 Geum strictum 

 G. O'regonense 

 Rosa Macounii 



