44 



running rootstocks, apparently annual, 

 about 3 ft high, erect, smooth: Ivs 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 

 V2 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 6-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 -2 lines long; 

 palet nearly as long as its glume, entire 

 or obtusely 2-toothed at tbe apex, the 

 keels ciliate or hispid-cifiate." Vasey, 

 bot gaz 10:268. "Common throughout the 

 Rocky Mountains, and in bottom lands it 

 is often) cut for hay, of which it makes 

 a*i excellent quality." Baja mts (Or 1159, 

 1163). 

 AGROSTIS DIEGOENSIS Vasey. 



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

 hig-h, 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 1 ); ligrtle about 2 lines 

 long, acute; panicle 6-8 inches long, 

 lanceolate, the joints rather distant 

 (the lower l%-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, !V 2 -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 1068). Ha U 54, Jac. 

 AGROSTIS TENTHS Vasey. 



"Perennial, loosely tufted. 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 l-l 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, 

 "-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. 

 ARISTIDA ARIZONICA Vasey. 



"Culms 1-2 ft. hig-h, 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 

 long-er one overlapping the internode 

 above, and naked below, the shorter 

 one sessile, each with 2-8 short pedt- 

 celled spikelets; outer glumes nearly 

 equal; 6-7 lines long, bidentate at the 

 apex, mucronate or awn pointed, his- 

 pid on the keel, 1-nerved or the lowei- 

 3-nerved; flowering glume to the di- 

 vision of the awn and including the 

 short hairy callus, 7-8 lines long, slen- 

 der, smooth below, scabrous and twist- 

 ed above, the awns nearly equal, 10-12 

 lines long, widely diverg-ent when ma- 

 ture. * * * Arizona." Vasey, Torr 

 cl b 13:27 (F 1886). 



Tourney (Ariz aes b 2) refers to this 

 especially, and other Aristidas in gen- 

 eral, as being rather unimportant 

 range grasses. 



Vasey, Grasses of the Southwest, pt 

 1 t 22. 

 ARISTIDA ORCUTTIANA Vasey. 



"Culms about 2 ft. high, stout below, 

 above becoming slender, very leafy: 

 leaves near the base with loose open 

 sheaths and rather broad blades, the 

 upper one-quarter shorter: flowering 

 inches long or more; panicle long and 

 open, 4-5 inches long; branches rather 

 distant, mostly single, flexuous, the 

 lower ones about 3 inches long, the 

 upper one-quarte shorter; flowering- 

 glume with the awn bent near the mid- 

 dle, and twisted below. The panicle is 

 small for the size of the plant, and 

 comparatively few-flowered. It ap- 

 proaches Aristida Schiediana. South- 

 ern California, C. R. Orcutt; Arizona. 

 M. E. Jones." Vasey Torr cl b 13:27 <F 

 1886). 



Hanson's ranch, 6,000 ft. elevatior.. 

 northern Baja California (H. C. and C. 

 R. Orcutt, 507-type) ; not "Southern 

 California" (?). 



BROMUS HORDEACEUS L. 



Bromus mollis L, Sp pi ed 2, 1:112 (1762). 



Serrafalcus mollis Parl PI ItaJ 1:396 

 (1848). 



Erect or ascending annual or biennial 

 with a rather dense, erect panicle; culms 

 about 2-8 dm high, usually somewhat 



