AGROSTIDE.E. 327 



2.5-3 mm. long; empty glumes mucronate, mintely scabrous, his 

 pid ou the keels, first scarcely longer than the second; floral glume 

 minutely scabrous, rather firm, truncate-toothed, a minute rough 

 rather stout awn attached a little below the apex; palea very thin, 

 0.5-1 mm. long. 



Distributed as A. mucronata Presl, but it does not answer to 

 that description. 



California, BohouJer G4GG, Dr. C. L. Anderson. 



Oregon to California. 



11. A. hyemalis (Walt.) B. S. P. Cat. N. Y. (1888). Hair- 

 grass. Cornucopice hymak^Viilt. Fl. Carol. 73 (1788). A. scahra 

 Willd. Sp. PI. 1 : 370 (1799). Tricliodium laxiflorum Bigel. Michx. 

 Fl. I. 42 (1803). T. scahrum Muhl. Gram. 61 (1817). A. 

 Michauxii Trin. Unifl. 206 (1824). 



An erect slender tufted biennial or perennial, 30-60 cm. high. 

 Ligule of the npper leaves 4 mm. long; blades scabrous, soon invo- 

 lute, 3-10 cm. long, 2 mm. wide. Panicle exserted when mature, 

 purple or brown, thin, 20-30 cm. long, branches rough, capillary, 

 purplish, 3-12 m each half-whorl, 4-7 cm. distant from each other, 

 spreading, 10-18 cm. long, branching above the middle, flower- 

 bearing only at and near the tips. Spikelets 1.5-2.5 mm. long, 

 usually about 2 mm., scabrous on the keels, glumes very acute, 

 the lower one the longer; floral glume 1.2-1.7 mm. long, obtuse, 

 5-nerved, sometimes short-awned ; palea minute or obsolete. Very 

 variable. 



New Brunswick, Fowler; Massachusetts, Sturtevant, Beat 69; 

 Vermont, Pringle; New Jersey, Scribner for U. S. Dept. Agricul. 

 403; Michigan, Clark 690, Becd 65, 66, 67, Farwcll, F. E. Wood 

 3386; Illinois, Becd 68; Iowa, HitchcocJc; Minnesota, Bailey B 

 129; Colorado, Fnffer.wn 263; Montana, Anderson 46, 60; Wyo- 

 ming, Bnffum c 25, c 88, c 90; Arizona, Jones 4015, Tourney 

 737, 738, 777, 937 b; Washington, Lake; Oregon, Hoivell; Cali- 

 fornia, Parish 1560 A, 1560; Southern California, Palmer 238, 

 239; Texas, Xealley; Mexico, Prinyle l-iW. 



Common from New England to Alaska and southward; also in 



