GRASS FAMILY 181 



2. A. repens Beauv. Quack-grass. Culnis 1 to 4 feet high, from a bright 

 yt'Ilow-gffcii (Tceping scaly rhizome: lilades thin, tlat, 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 uardens, BoJatidcr 1510. 



Rpfs. — AOROPYRON REPENS Beauv. Ess. Agrost. 102, 146. 1812. Triticum repens L. Sp. PI. 86. 

 1T.)3; Thurb. in Wats. Bot. Cal. 2: 323. 1881). Ai/ropyroii richardsoni [Schrad. 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 Deflowered, somewhat distant, 

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

 acuminate, V-; fo % as long a.s spikelet, the nerves usually faint; lemmas 

 mucronate or awn-pointed, hard, faintly nerved. 



Dry. especially alkaline soil; Modoc Co. (Smoke Creek. Oriffitlis d- Tluntcr 

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



Refs. — AfiROPYRON SMITHII Rydb. ilcm. N. Y. Bot. Gard. 1: 64. Feb. 1900. .4. occideiitale 

 .Sc-ribii. r. S. n.-jit. .Vgr. Div. Agrost. Cire. 27: 9. Dee. 1900. 



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

 zomes; blades narrow, mostly inAolute, scabrous; spike erect, 2 to ■") inches 

 long; spikelets few-flowered, about i- inch k)ng; glumes lanceolate, the first 

 narrow. 3 to fi-nerved. 4 lines long, the second i>roadcr. 5 to 7-nerved, 4io lines 

 long; Icunnas 4 to 5 lines long, more or less si'al)rous-pul>escent. acute or awn- 

 |ioiiited. 



Lassen Co. (mountains south of Dixie Valley. Hak(r tf- Xiitfiiig in 1894) north 

 to Washington and east to Saskatchewan and Colorado. 



Kefs. — Agropyrox subvillosum E. Nels. Bot. Gaz. 38: 37S. 1904. Triticum repens L. var. 

 subrillnsiim Hool?. Fl. Bor. Am. 2: 254. 1840. 



o. A. parishii Scribn. & Smith. Culms 3 to 4 feet high, without rhizonu-s, 

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

 b-ts-narrow, distant, mostly shorter than the internodes of the rachis. about 

 ■■'4 inch long; glumes about 8 lines long, several-nerved, acute, more than l/o 

 as long as spikelet; lemmas smcioth, faintl.v nerved, short-awned or awn- 

 ]i(iinted. 



Only kiKiwn from California. Pico P>lanco, ^lonterey Co.. Dari/ 7364; San 

 IVroardino Mts.. ParisJi 20:54. 2238. 4180. 



Refs. — A(;ropyron parishii Seribn. & Smith, U. S. I^ept. .\gr. Div. .^grost. Bull. 4: 28. 

 Is:i7. ly|ic I'iirish 2(\'A; Abrams, Fl. Los Ang. .^9. 1904. 



(!. A. laeve ITitchc n. comb. Culms 4 to o feet high, without riiizomcs; 

 M:iilcs flat ; spike ;is much as a foot long; spikelets distant, usually shorter 

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

 long; lemmas about o lines long, long-awned; awn VL' to 1 inch long. 



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

 Griffidis 4686; '-p^x. Herb. State Normal School, San Jose. Xorton in 1879. '" 



Refs. — AoROPYRON LAEVE Hitplip. .1. parishU Scribn. & Smith var. laere Seribn. & Smith, 

 r. S. Dept. Agr. Div. Agrost. Bull. 4: 28. 1897, type Palmer 414 in Gray Herbarinm collected 

 ill 187.5 at Fowley's, Cuyamaca Mts. : Abrams. Fl. Los Ang. .59. 1904. 



7. A. tenerum Vasey. Culms erc'l. tufted. 2 to 4 feet liigh. without rhi- 

 zomes; bJadrs narrow. Hat oi' involute; spike cylindrical, slender, crcrt. 4 to 



