348 POACE.E. 



upon the mountains. The color of the panicle is very variable, run- 

 ning from greenish straw-color, through various degrees of purple 

 to deep purple all over." Dr. Thurber in Bot. Calif., Vol. 2, p. 

 282. 



Montana, Cmiby 362; Washington, Sandherg 825, 1025. 



New England to the Rocky Mountains, Oregon, California. 



Var. longifolia Vasey, Contrib. U. S. Xat. Herb. 3:83 (1892). 



Blades of sterile shoots as long as the culm, involute-setaceous; 

 empty glumes 8 mm. long, acuminate; hairs more prominent, the 

 awn projecting 10 mm. above the floral glume. 



Calfornia, Bolander 6470. 



18. C. cinnoides (Muhl.) Scribn. Mem. Torr. Bot. Club, 5:41 

 (1894). Aruudo chmoidesMwhl. Gram. 187 (1817). A. coarctata 

 Torr. Fl. U.S. 1:94 (1824). Calamagrostis cinnoides Spreng. 

 Syst. 1:252 (1824). C. NuttaUiana Steud. Nom. Ed. 2. 1:251 

 (1841). PI. Gram. 190 (1855). C. Cawa^ewsis Nutt. Gen. 1 : 46 

 (1818), not Beauv. 



Perennial; culms stout, smooth or scabrous below, 90-150 cm. 

 high. Ligule 2-3 mm. long; blades flat, scabrous, 2-4 cm. long, 

 4-7 mm. wide, apex not attenuate. Panicle exserted, 6-10 cm. 

 long, 1-2 cm. broad, and then very dense or slightly interrupted 

 below, or larger, 10-20 cm. long, 2-3 cm. broad, and then inter- 

 rupted, bearing spikelike interrupted branches, 3-6 cm. long. 

 Spikelets lanceolate, scabrous, 6-7 mm. long; empty glumes 

 spreading, nearly equal, lanceolate, with awl-shaped tips, first com- 

 pressed-keeled, 1-nerved, second compressed-keeled above, 3-nerved; 

 floral glume 4-5 mm. long, scabrous, keeled, acute, with a few hairs 

 half its length on the back, on the margins numerous, longer and 

 rather stout ; awn straight, stout, starting one -fourth the way from 

 the tip of its glume, which it slightly exceeds; rudiment 1-1.5 mm. 

 long, bearing copious stiff hairs at the apex. 



Rhode Island, Tweedy; Massachusetts, Sturtevant; Delaware, 

 Canhy; District of Qolwmbio., McCarthy. 



Moist land, New England to Pennsylvania, North Carolina and 

 southward. Flowering in August. 



19. C. Tweedyi Scribn. Vasey, Contrib. U. S. Nat. Herb. 3 : 83 



