732 GRAMINE^] calamagrostis 



C. Suksdorfli Scribn. Vasey Monog: Grasses U. S. 82. A loosely 

 tufted perennial: stems rather slender, 1-3 feet high, erect smooth: 

 sheaths shorter than the internodes : lignles about 1 line long, obtuse, 

 often lacerate: leaves usually involute, 6-12 inches long, about 1 line wide: 

 panicle narrow, 2-6 inches long, densely flowered, its branches ascending 

 or appressed: empty glumes oblong, acute, keeled, 1% line long: flower- 

 ing glume lanceolate, about 1 line long, 2-toothed at the apex : awn nearly 

 straight, attached below the middle, but little longer than the glume: basal 

 hairs very few or none : palet lanceolate, nearly as long as the glume. In 

 open woods, eastern side of the Cascade Mountains. 



Var. luxurians Kearney U. S. Dept. Agr. Div. Agrost. Bull. 11, 24. 

 Stems stout, 4-5 feet high, usually of softer texture : leaves softer and less 

 involute : panicle larger and more loose. Washington to Brit. Columbia 

 and Idaho. 



C. Langsdorfli Trin. Unifl. 225. Densely cespitose perennial: stems 

 erect, simple, 2-4 feet high, smooth or roughish : sheaths shorter than the 

 internodes: ligules 1-3 lines long: leaves 4-12 inches long, 2-4 lines wide, 

 scabrous : panicle 2-6 inches long, loose, its branches spreading, or some- 

 times erect, the lower 1-3 inches long : empty glumes 2-3 lines long, strongly 

 scabrous, lanceolate, acuminate : flowering glume lanceolate, acute nearly 

 equalling the outer ones, scabrous : awn stout, about equalling the glume : 

 basal hairs numerous, nearly equalling the glume: palet lanceolate. In 

 damp places, California to Alaska and across the continent. 



C. lactea Beal Grasses N. Am. ii, 346. Stems stout, scabrous, 40-50 

 inches high: sheaths %-% as long as the internodes : ligules l-\% lines 

 long : leaves 10-15 inches long, 2-3 lines wide, scabrous : panicle slightly 

 exserted, silvery green, rather thin, 4-6 inches long, its branches in half- 

 whorls of 4-6, the longest \%-2% inches long: empty glumes subequal, 2-3 

 lines long, lanceolate, the first 1-nerved, the second 3-nerved : flowering 

 glume oval, acute, 2 lines long, the slender awn attached near the base and 

 equalling the glumes : basal hairs numerous, about half as long as the 

 glume. Northern Washington. 



C. Canadensis Beauv. Agrost. 157. A densely cespitose perennial : 

 stems 2-5 feet high erect simple, smooth or somewhat scabrous, sheaths 

 snorter than the internodes; ligules 1-3 lines long; leaves 6-12 inches long 

 or more, 1-4 lines wide, rough: panicle 4-7 inches long, open, usually purp- 

 lish, the branches spreading or ascending, the lower 1-3 inches long, naked 

 at the base: empty glumes subequal acute strongly scabrous, 13^-2 lines 

 long : flowering glume lanceolate, about equalling the empty ones, scabrous : 

 awn delicate, about equalling the glume: basal hairs numerous, about 

 equalling or shorter than the glume. Common in wet meadows, California 

 to Alaska and across the continent. 



Var. acuminata Vasey U. S. Dept. Agr. Div. Agrost. Bull. 5, 26. 

 Panicle commonly rather small, more flexuous, and densely flowered, usu- 

 ally dark purple: empty glumes narrower, sharp attenuate-acuminate, 

 usually much more scabrous : awn longer, often exceeding the flowering 

 glume. In meadows, California to Alaska and the Rocky Mountains. 



C. Maconniana Vasey Contrib. U. S. Nat. Herb, iii, 81. Stems 2-3 

 feet high, erect, smooth : sheaths shorter than the internodes : ligules about 

 1 line long: leaves 3-7 inches long, 1-2)^ lines wide, erect, acuminate, 

 scabrous : panicle open, 3-5 inches long, its branches ascending or some- 

 times erect, the lower 1-1.^ inches long : empty glumes about 1 line long, 

 acute, scabrous, the first shorter than the second ; awn a little exceeding 

 the glume : basal hairs about equalling the glume. Washington to Brit. 

 Columbia and Manitoba. 



C. Scribneri Beal Grasses N. Am. ii, 343. Stems rather slendei, 



