GRASS FAMILY 181 



2. A. repens Beauv. QUACK-GRASS. Culms 1 to 4 feet high, from a bright 

 yellow-green creeping scaly rhizome; blades thin, flat, sparsely pilose above; 

 spike 2 to 6 inches long ; spikelets about 5-flowered, 5 to 7 lines long ; glumes 

 4 to 5 lines long, acuminate or awn-pointed, strongly nerved ; lemmas 5 lines 

 long, glabrous or scabrous, strongly nerved, pointed or awned. 



A common and troublesome weed in the eastern U. S., rare on the Pacific coast ; 

 introduced from Europe. San Francisco in gardens, Bolander 1510. 



Eefs. AGROPYRON REPENS Beauv. Ess. Agrost. 102, 146. 1812. Triticum repens L. Sp. PI. 86. 

 1753; Thurb. in Wats. Bot. Cal. 2: 323. 1880. Agropyron richardsoni [Schracl. misapplied by] 

 Davy in Jepson, Fl. W. Mid. Cal. 76. 1901. 



3. A. smithii Rydb. Plant usually glaucous, from gray or tawny creeping 

 scaly rhizomes ; culms 1 to 5 feet high, rigid ; blades bluish green, scabrous, 

 firm, striate, becoming involute; spikelets 7 'to 13-flowered, somewhat distant, 

 glabrous or nearly so, acute, compressed, divergent, sometimes in pairs ; glumes 

 acuminate, % to % as long as spikelet, the nerves usually faint; lemmas 

 mueronate or awn-pointed, hard, faintly nerved. 



Dry, especially alkaline soil; Modoc Co. (Smoke Creek, Griffiths & Hunter 

 489) north to Vancouver Island and east to Michigan and Kansas. 



Eefs. AGROPYRON SMITHII Rydb. Mem. N. Y. Bot. Gard. 1: 64. Feb. 1900. A. occidentals 

 Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 27: 9. Dee. 1900. 



4. A. subvillosum E. Nels. Culms 1% to 3 feet high, from creeping rhi- 

 zomes; blades narrow, mostly involute, scabrous; spike erect, 2 to 5 inches 

 long; spikelets few-flowered, about % inch long; glumes lanceolate, the first 

 narrow, 3 to 5-nerved, 4 lines long, the second broader, 5 to 7-nerved, 4 l / 2 lines 

 long; lemmas 4 to 5 lines long, more or less scabrous-pubescent, acute or awn- 

 pointed. 



Lassen Co. (mountains south of Dixie Valley, Baker & Nutting in 1894) north 

 to Washington and east to Saskatchewan and Colorado. 



Eefs. AGROPYRON SUBVILLOSUM E. Nels. Bot. Gaz. 38: 378. 1904. Triticum repens L. var. 

 subtiUosum Hook. Fl. Bor. Am. 2: 254. 1840. 



5. A. parishii Scribn. & Smith. Culms 3 to 4 feet high, without rhizomes, 

 the nodes pubescent; blades flat; spike narrow, as much as foot long; spike- 

 lets narrow, distant, mostly shorter than the internodes of the rachis, about 

 % inch long; glumes about 8 lines long, several-nerved, acute, more than i/> 

 as long as spikelet; lemmas smooth, faintly nerved, short-awned or awn- 

 pointed. 



Only known from California. Pico Blanco, Monterey Co., Davy 7364; San 

 Bernardino Mts!, Parish 2054, 2238, 4180. 



Eefs. AGROPYRON PARISHII Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. Bull. 4: 28. 

 1897, type Parish 2054; Abrams, Fl. Los Ang. 59. 1904. 



6. A. laeve Hitchc. n. comb. Culms 4 to 5 feet high, without rhizomes; 

 blades flat; spike as much as a foot long; spikelets distant, usually shorter 

 than the internodes of the rachis; glumes obtuse, several-nerved, about 5 lines 

 long; lemmas about 5 lines long, long-awned; awn a /2 to 1 inch long. 



Only known from California. Clinton, Hansen 1767; Dunlap to Millwood, 

 Griffiths 4686; "Ex. Herb. State Normal School, San Jose, Norton in 1879." 



Refs. AGROPYRON LAEVE Hitchc. A. parishii Scribn. & Smith var. laeve Scribn. & Smith, 

 LT.'S. Dept. Agr. Div. Agrost. Bull. 4: 28. 1897, type Palmer 414 in Gray Herbarium collected 

 in 1875 at Fowley's, Cuyamaca Mts. ; Abrams, Fl. Los Ang. 59. 1904. 



7. A. tenerum Vasey. Culms erect, tufted, 2 to 4 feet high, without rhi- 

 zomes ; blades narrow, flat or involute; spike cylindrical, slender, erect. 4 to 



