FESTUCE.E. 



493 



Culms 40-70 cm. high. Ligule fringed, 1.5 mm. long; blades 

 flat, scabrous, tliose of the culm 8- 

 16 cm. long, 2-3 mm. wide. Pani- 

 cle dense, contracted, usually inter- 

 rupted, 6-11 cm long, 8-12 mm. 

 diam., sometimes tinged with pur- 

 ple. Spikelets crowded ; first empty 

 glume 1.2-2 mm. long, second 2-2.2 

 mm. long; floral glume obovate, 

 1.8-2.2 mm. long. 



Illinois, WoJfe for U. S. Dept. Fig. 98. — Eatonia obtusata. A, 



A • 1 f-ey, T Tr-2 7 7 spikelet; a, lioret. (Scribner.) 



Agricul. 564; Iowa, Hitchcoch; t- > v / 



Colorado, Cassidy; W3'0ming, Buffuni C 104, C 148; California, 



Parish 1640; Washington, Lake; southern California, Parish 



1640. 



Dr}^ soil, Pennsylvania to Florida, Michigan, Colorado, and 

 Oregon. 



Var. robusta Vasey, ined. Stouter, blades 5-7 mm. wide. Pan- 

 icle branched, 15-18 cm. long. 



New Mexico, Vasey; State of Washington, U. S. Dept. 

 Agricul. 



5. E. Pennsylvanica (DC.) A. Gray, Man. Ed. 2:558 (1856). 

 Kceleria Pennsylvanica DC. Cat. Hort. Monsp. 117 (1813). 

 Aira triflora Ell. Bot. S. C. & Ga. 1:153 (1817). Aira mollis 

 Muhl. Gram. 82 (1817). Eatonia purpurasce7is Rafin. Journ. Phys. 

 89:104 (1819). Rehoulia Pennsylvanica A. Gray, Man. Ed. 1: 

 591 (1848). 



Culms 60-90 cm. high. Leaf-blades scabrous, 8-15 cm. long, 

 acuminate. Panicle slender or stouter, considerably interrupted, 

 12-20 cm. long, branches lax, racemose, often 3-5 cm. long. 

 Empty glumes thin, scabrid on the keels, first very slender, 1.5-2.2 

 mm., second obovate or abruptly pointed, 2.2-3 mm. long; floral 

 glume lance-linear, mucronate-pointed or scarcely acute when 

 spread, 2.2-3 mm. long; palea 2 mm. long. 



Very large forms with ample j)anicles have been called var. 

 tnajnr Torr. 



