252 POACE^. 



Mexico, Pringle 398, 3477. 



27. M. Mexicana (L.) Triu. Unifl. 189 (1824). Agrostis Mex- 

 icanaJj. Maut. 1:31 (1767). A. lateriflora Miclix. Fl. Bor. Am. 

 1:53(1803). C i )ma Meoricana Be2i\\\. Kgxo&i. 'd'i (1812). Mnli- 

 hnhergia foliosa Trin. Unifl. 190 (1828). 



Culms slender, wiry, ascending, mnch-branclied, 60-100 cm. 

 high, from scaly creeping rootstocks. Sheaths about two-tliirds as 

 long as the internodes; ligule 0.5 mm. long; blades thin, flat, sca- 

 brous, pungent-pointed, 10-15 cm. long, 3-5 mm. wide. Panicle 

 often purplish, lateral and terminal often included at the base, con- 

 tracted, 10-18 cm. long, rays mostly in thi-ees, two of which are 

 very short, the longest linear, 3-5 cm. long, and densely flowered 

 nearly to the base. Empty glumes sharp-pointed or short-awned, 

 slightly unequal, the lower a little longer than the floret, 2.5-3 mm. 

 long; floral glume thinly jjubescent on the lower half, lanceolate, 

 very sharp pointed, 3-nerved, 2-2.5 mm. long. 



Vermont, Pringle ; New York, Beal 48 ; District of Columbia, 

 McCarthy; Michigan, ^mZ 49, Wheeler bO; Minnesota, Bailey X 

 28, B 422. 



Found rather abundantly on low lands from New England to 

 Nebraska and Mexico; flowering too late in autumn to be of much 

 value for hay. 



Var. filiformis (Muhl.) Scribn. ined. Agrostis fll if orni is Muhl. 

 Gram. 66 (1817). 



Panicle very slender and simple, borne on long filiform pedicels. 



Illinois, U. S. Dept. Agricul. 318, from Wolfe. 



28. M. racemosa (Michx.) B. S. P. Prel. Cat. N. Y. 67 (1888). 

 Agrostix raee))wsa Michx. Fl. Bor. Am. 1:53 (1803). Pohjpogon 

 gloineratns Wiild. Enum. 87 (1809). Trichorhloa glomerata Trin. 

 Fund. Agrost. 117 (1820). M. glomerata Trin. Unifl. 191 (1821). 

 Cinna racemosa Kunth, Enum. 1:207 (1833). 



An erect simple sparingly-branched perennial, 60-90 cm. higb. 

 Sheaths nearly as long as the internodes; ligule a ciliate ring; 

 blades flat, scabrous, pungent-pointed, 8-12 cm. long, 3-5 mm. 

 wide. Panicle 5-10 cm. long, often purplish, exserted, oblong- 

 linear, often interrupted below, rays very short and densely 



