746 GRAMINEZ DESCHAMPSIA 
: ARRHENATHERUM 
about 144 lines long, erose-truncate at the apex: awn straight, inserted 
above the middle, 1-2 lines long. Common in moist meadows, California 
to Alaska and across the continent. ; 
D. atropurpurea Scheele Flora xxvii, 56. Stems 6-18 inches high, 
erect, simple, rigid: sheaths shorter than the internodes: ligules truncate, 
1 line long or less: leaves 2-5 inches long, 1-2 lines wide, flat: panicle 1-2 
inches long, narrow, usually purple or purplish, its branches erect, or 
sometimes ascending, the lower 6-18 lines long: empty glumes broadly 
lanceolate, acute, 2% lines long: flowering glumes oblong, erose-truncate 
at the apex, about 114 lines long: awn bent and much exceeding the 
glume, Alpine summits of the high mountains, Oregon to Alaska and 
across the continent. 
D. elongata Munro in Benth. Pl. Hartw. 242, t. 228. Densely cespi- 
tose perennial: stems very slender, 1-2 feet high, simple, erect,: leaves 
very numerous, mostly basal, 1-18 inches long, flat and smooth, less than 
1 line wide: ligules elongated: panicle very long and narrow, 4-12 inches 
long, its very unequal scabrous capillary branches mostly appressed: 
empty glumes about 2 lines long, linear-subulate, nearly equal, green and 
scabrous on the keel: flowering glumes about 1 line long, smooth and 
shining, with a silky tuft at base, irregularly 5-toothed above, with a very 
slender awn. 2 lines long from near the base, Common in open woods, 
California to Washington, west of the Cascade Mountains. 
D. ealycina Presl Rel. Heenk. i, 251. Loosely tufted annual: stems 
slender, 2-24 inches high, sometimes geniculate and sparingly branched 
below: leaves very narrow those of the stem 1-2 inches long, with elonga- 
ted ligules: panicle very loose, and open,.1-12 inches long, the lower branch- 
es in threes, the others in pairs or solitary, distant, mostly spreading: em- 
pty glume-3 lines long or more, linear-lanceolate, green and rough on the 
keel: flowering glumes about a line long, shining below its truncate 4- 
toothed apex, the hairsat base 44 as long: awn inserted just below the 
middle, about 3 lines long, twisted below and bent near the middle common 
in places that are wet in spring. California to Washington. 
31 ARRHENATHERUM Beauv. Agrost. 55, t. 11, fig. 5. 
_ Tall perennial grasses with flat leaves and narrow or open 
panicles. Spikelets 2-flowered, the upper flower perfect, the lower 
staminate the rachella extended beyond the flowers. Glumes 4, 
the 2 lower empty, thin-membranous, keeled, very acute or awn- 
pointed, unequal, persistent: flowering glumes rigid 5—7-nerved 
deciduous, the first bearing a long bent and twisted dorsal awn 
inserted below the middle, the second unarmed. Palet hyaline, 
2-keeled. Stamens 3. Styles short distinct. Stigmas plumose. 
Grain ovoid free. 
A. xELatiu: Beauv. M. & K. Deutsch. Fl. i, 546. Glabrous perennial: 
stems 2-4 feet high, erect, simple: lower sheaths longer than the internodes 
ligules 1 lines long: leaves 2-12 inches long, 1-4 lines wide, scabrous: 
panicle 4-12 inches long, narrow, branches erect, the lower 1-2 inches 
long, empty glumes finely roughened, the second 4 lines long, nearly twice 
as long as the first one? flowering glumes about 4 lines long. In meadows 
and waste places; naturalized from Kurope. 
31 HOLCUS L. Sp. 1047. 
Annual or perennial grasses with flat leaves and open or spike- 
like panicles. Spikelets dicecivus, 2-flowered, the lower flower 
