10 



AGROPYRON REPENS Beauv. 



Cruz; Rosa; Potrero, . Chollas (Or 498). 

 AGROPYRON TENERUM Vasey. 



"Culms in tufts or patches, without 

 running rootstocks, apparently annual, 

 about 3 ft high, erect, smooth: lvs nar- 

 row, 1 or 2 lines wide, 3-6 in. long; sheaths 

 striate, smoothish; ligule short: spike 

 slender, cylindrical, 4-6 in. long, 1 or 2 

 lines wide, with the spikelets one-third to 

 y 2 in. distant, sometimfles wider and with 

 the spikelets closer; axis scabrous: spike- 

 lets 3-5 fl'd; outer glumes 5-6 lines long, 

 rigid, lanceolate, acute or awn-pointed, 

 strongly 5-nerved; fl'ng glumes lanceo- 

 late, acute, 4-5 lines long, rounded on the 

 back, smooth or smoothish and with the 

 nerves indistinct below, above conspicu- 

 ously 5-nerved and scabrous, terminated 

 with a stiff, straight awn %-2 lines long; 

 palet nearly as long as its glume, entire 

 or obtusely 2-toothed at the apex, the 

 keels ciliate or hispid-ciliate." — Vasey, 

 bot gaz 10:258. "Common throughout the 

 Rocky Mountains, and in bottom lands it 

 is often) cut. for hay, of which it makes 

 an excellent quality." Baja mts (Or 1159, 

 1163). 



Genus AGROSTIS Linnaeus. 



AGROSTIS AEQUIVALVIS Trin. 



Parish, Erythea 3:59. Bear. 

 AGROSTIS ATTEINUATA Vasey. 



McClatchie. Erythea 2:78. Gabriel. 



Alaska to California. 

 AGROSTIS DENSIFLORA Vasey. 



Santa Cruz, Cal. (Dr. C. D. Anderson). 

 AGROSTIS DIBGOENS1S Vasey. 



"Culms erect, stout, 2-3 ft. or more 

 high, smooth; leaves 4-7 inches long - , 

 1-2 lines wide, erect, those of the culm 

 with long sheaths (the upper ones 8 

 or 9 inches long) ; ligule about 2 lines 

 long, acute; panicle 6-8 inches long, 

 lanceolate, the joints rather distant 

 (the lower iy 2 ~2 inches; branches nu- 

 merous, unequal, erect, the longer 

 ones about 2 inches long, and florifer- 

 *ous above the middle, the shorter florif- 

 erous to the base, the flowers numer- 

 ous; spikelets light green, l%-2 lines 

 long, outer glumes acute, scabrous on 

 the keel; flowering glume one-third 

 shorter, oblong, obtuse, the mid-nerve 

 terminating about the middle, with or 

 without a minute " awn; palet none. 

 San Diego, California, by C. R. Or- 

 cutt.'' — Vasey, Torr * cl b 13:55 (Ap 

 1886). Chollas valley (Orcutt 1058), San 

 Diego, Cal. (type). 



Cruz; Chollas (Or 1058). Ha U 54, Jac. 

 AGROSTIS EXARATA Trin. 



Agrostis albicans Buckl, Phila ac pr 

 1862, 91. 



Polypogon alopecuroides Buckl, Phila 

 ac pr 1862, 88. 



Smith mt, S D Co (H. C. Orcutt); Alas- 

 ka; N. M.; Colo; Chollas (Or 518, 105S— 

 "probably forma asperfolia Vasey"). 

 AGROSTIS GRANDIS Trin. 



Smith mt, S D Co (H. C. Orcutt). 

 AGROSTIS MICROPHYLLA Steud. 



McClatchie, Erythea 2:78. Gabriel. 



Potrero; Wash. Mesas S D Co (Or 1176). 

 AGROSTIS MULTICULMIS Vasey. 



Potrero (Or 959). 

 AGROSTIS PILOSA Beauv. 

 AGROSTIS SCABRA Willd. 



Smith mt, S D Co (H. C. Orcutt) ; Alas- 

 ka; Siberia; Tucson; Arizona (Tourney). 

 AGROSTIS SCOULEiRI Trin. 



Rosa; San Diego (?Orcutt). 



AGROSTIS TENUIS Vasey. „ 



"Perennial, loosely tufted 1 . Culms 6-10 

 in. high, slender, somewhat geniculate 

 below; leaves 1-2 in. long, narrow, about 

 2 on the culm; ligule short. Panicle pyr- 

 amidal, open, 2-3 in. long and 1-1% wide; 

 rays in three or fives below, above in 

 twos or single, capillary, the longest 1 in. 

 or more in length, fl'ng above the middle, 

 spreading or erectish. Spikelets very 

 small (less than a line long) ; glumes a- 

 cute, purplish, the lower a little shorter 

 and broader; fl'ng-glume thin, obtutish, 

 3-nerved above, a little shorter than the 

 outer glumes, unawned; palet very mi- 

 ute or wanting." Vasey, Torr cl b 10:21. 

 San Bernardino mts (Parish). Wash. 

 AGROSTIS VERTICILLATA Vill. 



Cantilles! S D Co (Or 1168). Texas. 

 AGROSTIS VIRESCENS HBK. 



San Diego (Or 1173). Mexico. 

 AGROSTIS VULGARIS With. 



Parish, Erythea 3:59.— "Naturalized 

 about San Bernardino, in meadows and 

 by roadsides." 

 ALOPEiCURUS CALIFORNICUS Vasev. 



Santa Cruz Isl; SD! 

 ALOPECURUS GEINICULATUS L. 



Mesas, S D! Baja (Or 1438). 

 Variety ARISTULATUS Torrey. 

 ANDROPOGON MACROURUS Mich. 



McClatchie, Erythea 2:77. Gabriel mts. 



Cantilles (Or 1144, 1163). 

 ANDROPOGON SACOHAROIDES Swtz. 



Baja (Or 514); Colo; Kansas. 

 ANDROPOGON D1SSITIFLORUS Michx 

 ANDROPOGON CIRRHATUS Hackel. 

 ANDROPOGON HIRTIFLORUS Kth. 

 ANDROPOGON WRIGHTII Hackel. 



Genus ARISTIDA Linnaeus. 



ARISTIDA AMERICANA L f. 



Colorado Desert (Or 2075). 

 ARISTIDA ARIZONICA Vasey. 



"Culms 1-2 ft. high, tufted, rigidly 

 erect, unbranched, leafy to the middle, 

 smooth; leaves of the culm about 4, of 

 nearly equal length, 4-8 inches long, 

 canaliculate or becoming convolute, 

 narrow and somewhat rigid, smooth; 

 panicle 5-10 inches long, narrow; the 

 blanches in twos below appressed, 

 somewhat distant (the lower inter- 

 nodes 2-3 inches long), unequal, the 

 longer one overlapping the internode 

 above, and naked below, the shorter 

 one sessile, each with 2-8 short pedi- 

 celled spikelets; outer glumes nearly 

 equal, 6-7 lines long, bidentate at the 



