GRAMINE^E. 487 



19. SPARTINA, Sclireb. 

 1. Spartina gracilis, Trin. 

 Hab. Okanagan, Washington Territory. 



2. Spartina strict a, var. folios a. 



Sparti?ia foliosa, Trin. Agrost. 1, p. 92. 



Hab. San Francisco, California.— There seems to be little doubt 

 that this is the plant described by Trinius as S. foliosa, and that it is 

 only a form of the variable JS. striata with the leaves much crowded 

 at the top of the culm, and equalling or exceeding the panicle. 



20. A IRA, Linn. 



1. AlRA DANTHONIOIDES, Trin. 

 Aira danthonioides, Trin. in Act. Petrop. 1830, 1, p. 57, & Icon. t. 257. 

 Hab. Spipen River and north branch of the Columbia. 



2. Aira elongata, Hook. 

 Aira elongata, Hook. Flor. Bor.-Am. 2, p. 243, t. 228. 



Hab. Nisqually, &c, "Washington Territory. — The specimens vary 

 in length from a few inches to two feet or more. The hairy abortive 

 pedicel often as long as the floret below it. 



3. Aira c^espitosa, var. longiflora, Trin. 



Aira cozspitosa, var. longiflora, Trin. in Herb. Torr. 



Hab. Nisqually and the north branch of the Columbia. — Some of 

 the culms are 4 or 5 feet long, with the panicle of a fine bronze color, 

 and quite agreeing with authentic specimens named by Trinius. 



