GRASS FAMILY 



161 



13. Calamagrostis macouniana Vasey. 

 Macoun's Reed-grass. Fig. 361. 



Devcn.vta macouniana Vasey, Bot. Gaz. 10: 297. 1885. 

 CaJamaqrostis macuuniana Vasey, Contr. U. S. Nat. Htrb. 3: 

 81. ■ 1892. 



Culms slender, about 1 meter tall ; sheaths smooth ; 

 ligule 2-3 mm. long; blades slender, flat, narrowed to a 

 slender involute point, scabrous, 15-20 cm. long, or the 

 uppermost shorter, about 3 mm. wide ; panicle narrow, 

 rather open, 10-15 cm. long; glumes broad, abruptly 

 acuminate, 2 mm. long; lemma a little shorter than the 

 glumes, bifid at apex, the lobes obtuse, the awn straight 

 or a little bent, extending somewhat beyond the sum- 

 mit of the lemma, the callus hairs about as long as 

 the lemma. 



Marshes and wet places in the Arid Transition Zone; Alberta 

 to Oregon, and east to the Rocky Mountains. July. Type lo- 

 cality: Assiniboia. 



14. Calamagrostis canadensis (Michx.) Beauv. 

 Blue-joint. Fig. 362. 



Ai-undo canadensis Michx. Fl. Bor. Am. 1: 73. 1803. 

 Calamagrostis canadensis Beauv. Ess. Agrost. IS, 157. 1812. 

 Calamagrostis oregoiiensis Buckl. Proc. Acad. Phila. 1862: 92. 



1863.' 

 Calamayrostis coluinbiensis Nutt.; A. Grav, Proc. Acad. Phila. 



1862: 334. 1863. 

 Calamagrostis pallida Vasey & Scribn. Contr. U. S. Nat. Herb. 



3: 79. 1892. 

 Calamagrostis lactea Beal, Grasses N. Am. 2: 346. 1896. 

 Dexeuxia lactea Suksdorf; Beal, Grasses N. Am. 2: 346. 1896. 

 Calamagrostis blai'da Beal, Grasses N. Am. 2: 349. 1896. 

 Calamagrostis canadensis acuminata Vasev, U. S. Dept. Agr. Div. 



Agrost. Bull. 5: 26. 1897. 

 Calamagrostis langsdorffii lactea Kearn. U. S. Dept. Agr. Div. 



Agrost. Bull. 11: 28. 1898. 

 Calamagrostis inexpansa cuprea Kearn. U. S. Dept. Agr. Div. 

 Agrost Bull. 11: 37. 1898. 



Culms 60-120 cm. tall, from creeping rliizomes ; 

 blades scattered, fiat, rather lax, scabrous, 4-8 mm. 

 wide ; panicle narrow but loose, rather open, especially 

 at base; glumes 3-4 mm. long, smooth, scabrous on 

 keel, acuminate; lemma nearly as long as glumes, 

 smooth, narrowed toward summit ; callus hairs abun- 

 dant, about as long as the lemma ; awn delicate, straight, 

 attached just below the middle and extending to or 

 slightly beyond its tip ; rudiment delicate, sparsely long- 

 pilose. 

 Marshes, wet places, open woods, and meadows. Transition to Hudsonian Zones; Alaska to Oregon and 

 south in the Sierra Nevada Mountains to Mount Whitney, east to the Atlantic States. July-Sept. Type 

 locality: Canada. 



15. Calamagrostis crassiglumis Thtirb 



Thurber's Reed-grass. 



Fig. 363. 



Calamagrostis crassiglumis Thurb. in .S. Wats. Bot. Calif. 2: 



281. 1880. 

 Deyeuxia crassiglumis Vasey, Grasses U. S. 28. 1883. 



Calamagrostis neglecta crassiglumis Beal, Grasses N. Am. 2: 

 353. 1896. 



Culms rather stout, 15-40 cm. tall; blades fiat, or 

 somewhat involute, smooth, firm, about 4 mm. wide ; 

 panicle narrow, spikelike, 2-5 cm. long ; glumes 4 mm. 

 long, ovate, rather abruptly acuminate, purple, sca- 

 berulous, firm or almost indurate ; lemma about as long 

 as glumes, broad, obtuse ; callus hairs abundant, about 

 3 mm. long ; awn attached at middle of back, straight, 

 about as long as lemma ; rudiment 1 mm. long, the 

 white hairs reaching to apex of lemma. 



Swampy soil. Transition Zone; Vancouver Island to Wash- 

 ington; also in Mendocino Countv, California, the type locality. 



July. 



