64 



ELYMUS 



Americanus, V. & S. 

 arenarius, L. 

 Canadensis, L. 



var. glaucifolius, Gray. 

 Columbiana, Macoun. 

 condensatus, Presl. 

 dasystachys, Trin. 

 Macounii, Vasey. 

 mollis, Trin. 

 striatus, Willd. 

 Vancouverensis, Vasey. 

 Virginicus, L. 



var. submuticus, Hook. 



ERAGROSTIS 



major, Host 

 minor, Host. 

 Purshii, Schrad. 

 reptans, Nees. 



PESTUCA 



duriuscula, Lam. 

 elatior, L. 

 microstachya, Nutt. 



var. divergens, Thurb. 



var. pauciflora, Scrib. 

 Myurus, L 

 nutans, Willd. 

 occidentalis, Hook, 

 ovina, L. 



var. brevifolia, Watson. 



var. polyphylla, Vasey. 



var. vivipara, Gray. 

 Richardsonii, Hook, 

 rubra, L. 



var. villosa, Vasey. 

 scabrella, Torr. 

 subulata, Bong, 

 tenella, Willd. 



FLUMINIA 



arundinacea, Fries. 



GLYCERIA 



angustata, Ledeb. 

 arctica, Hook, 

 arundinacea, Kunth. 

 Canadensis, Trin. 

 distans, Wahl. 



var. airoides, Vasey. 

 elongata, Trin. 

 festucaeformis, Reich, 

 fluitans, R. Br. 

 Lemmoni, Vasey. 

 maritima, Wahl. 

 nervata, Trin, 

 obtusa, Trin. 

 pallida, Trin. 

 pauciflora, Presl. 

 pumila, Vasey. 



GRAPHEPHORUM 



melicoides, Gray. 

 Wolfii, Vasey. 



HIEROCHLOA 



alpina, R. & S. 

 borealis, R. & S. 

 pauciflora, R. Br. 



HOLCUS 



lanatus, L. 



HORDEUM 



jubatum, L. 

 maritimum, With, 

 murinum, L. 

 pratense, Huds. 

 pusillum, Nutt. 



KCELERIA 



cristata, Pers. 



var. gracilis, Gray. 



var. major, Vasey., N. var. 



LEERSIA 



oryzoides, Swartz. 

 Virginica, Willd. 



