FLORA OF THE YELLOWSTONE NATIONAL PARK. 69 



GRAMINEJE. 



NOTE The numbers appended to the species below are those under 

 which the author's specimens have been distributed. Mr. F. L. Scribner 

 will shortly publish in the "Botanical Gazette" critical notes on the 

 author's collections of 1884 and 1885. 



Panicum dichotomum, L., var. pubescens (P. thermale, Bol.). 



Very common over the hot spring and geyser areas (263,580) . 



Spartina gracilis, Trin. 



"In both Geyser Basins " (Coulter). 



Phalaris arundinacea, L. 



Bogs. Yellowstone Lake (579) ; Upper Canon of the Madison (Coulter). 

 Rare. 



Hierochloa borealis, R. and S. 



Rather common in mountain meadows from 8000-9000 ft. alt, (648). 



Alopecurus occidentalis, Scribn. (A. pratensis, var. alpestris, Wahl. ex Gray). 



Frequent in mountain meadows from 7500-9000 ft. alt. Associated 

 with the preceding and Phleum alpinum (591). 



Alopecurus geniculatus, L., var. aristulatus, Torr. (A. aristulatm, Michx.). 



Muddy shores of ponds and banks of streams. Cache Creek, 6800 ft. 

 alt.; Turbid Lake, 7900 ft. alt. (592). 



Aristida fasciculata, Torr. (.4. purpurea, Nutt.). 



Hot Sulphur Springs and Yellowstone Lake (Adams). 



Stipa viridula, Trin. 



Common everywhere over the dry open areas up to 8000 ft. alt. (262, 

 609, 613). 



Stipa Richardsonii, Link. 



Soda Butte Creek, 6800 ft. alt. With the preceding, but much less 

 common (611). 



Stipa comata, Trin. and Rupr., var. intermedia, Scribn. 



Throughout with S. viridula ; rather less frequent (610). 



Oryzopsis asperifolia, Michx. 



Pine woods, Soda Butte Creek, alt. 7500. Rare (615). 



Oryzopsis exigua, Tlmrb. 



On rocky bare knolls along Slough Creek, alt. 6700 ft. Rare (614). 



