11 



12 



apex, mucronate or awn pointed, his- 

 pid on the keel, 1-nerved or the lower 

 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 divergent 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 BROMOIDES HBK. 



Shollas (Or 1071); C D (Or 2245); Baja 

 (Or 1436). 

 ARISTIDA CALIFORNICA Thurber. 



C D (Schott); Ft. Mohave (Cooper). 

 Variety FUGITIVA Vasey. 



CD! 

 Variety MAJOR Vasey. 



Magdalena Island (Br). 

 ARISTIDA DISPERSA Trim 

 ARISTIDA DIVARICATA H-B. 



Baja mts (Or 1111): S Ber; Arizona. 

 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 

 1S86). 



Hanson's ranch, 6.000 ft. elevation, 

 northern Baja California (H. C. and C. 

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

 California" (?). 

 ARISTIDA PURPUREA Nutt. 



Baja (Or 1146); Arizona (Or 2515. 2532). 

 Varietv FENDLERIANA Vasey, U S Na 



hb cont 3:46. 



Parish. Erythea 3:59. — "Rose mine, alt. 

 6,000 ft., eastern slope of the San Bernar- 

 dino mts., Calif." 

 ARISTIDA SCABRA Kth. 



Bajai (Br); Mexico. 



Genus AVENA Linnaeus. 



AVENA BARBATA Brot. 



McClatchie, Erythea 2:78: Pasadena; 

 Catalina. 



AVENA FATUA Linn. 

 Variety GLABRESCENS Coss. 



Parish, Erythea 6:86. Nordhoff (Hubby), 

 and San Bernardino, Cal. 



Florets clothed with hairs only on the ; 

 rachilla and at the base of the flowering' 

 glumes. In aspect not different from the 

 type. 



Genus BOITELOUA Lagasca. 



BOUTELOUA POLYSTACHYA Torr. 



Chondrosium polystachyum Bth Bot 

 Sulph 56. 



CD (Or 1468; 2064, near Ft Yuma). Texas 

 BOUTELOUA RACEMOSA Lag. 



Baja. mts (Or 671). N. Y. 



Genus BROMIS Linnaeus. 



BROMUS CARINATUS H-A. 

 Var. CALIFORNICUS Shear. 



Bromus californicus Nutt in Phila. ac. 

 herb. 



Todos Santos bay, Baja California (Miss 

 P. E. Fish). Potrero valley and San 

 Diego, California. (Orcutt 511a). 

 Var. HOOKERIANTJS Shear. 



Bromua hookerianus Thurb in Wilkes U. 

 S. Exp. Exped 17: 493 (1874). 



Ceratochloa grandiflora Hook Fl. Bor. 

 Am. 2: 253 (1840). 



Bromus virens Buckl Phila. ac. pr. 1862: 

 93. 



Bromus nitena Nutt in Phila ac. herb. 



California, Washington, Idaho. 

 BROMUS CILIATUS L. 

 BROMUS ERECTUS Huds. 

 BROMUS HORDEACEUS L. 



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



Serrafalcus mollis Pari Fl Ital 1:395 

 (1848). 



Erect or ascending annual or biennial 

 with a rather dense, erect panicle; culms 

 about 2-8 dm high, usually somewhat 

 pubescent at the nodes; sheaths retrorse- 

 ly soft pilose-pubescent; ligule 1.5-2 mm. 

 long, laciniate; blades linear, pilose-pub- 

 escent to nearly smooth, about 5-15 cm 

 long and 3-5 mm broad; panicle con- 

 tracted, narrow pyramidal, 5-10 cm long, 

 2-4 broad; branches somewhat spreading 

 in flower; spikelets 5-13 flowered, ovate- 

 lanceolate, becoming obtuse, 12-15 mm 

 long, 4-6 wide, with short pedicels: empty 

 glumes broad, obtuse, coarsely pilose or 

 scabrous-pubescent, the lower 3-5-nerved, 

 4-6 mm long, the upper 5-7-nerved, 7-8 

 mm long; flowering glume broad, obtuse, 

 7-nerved, coarsely pilose or scabrous- 

 pubescent, rather deeply bidentate, mar- 

 gin and apex hyaline, 8-9 mm long: awn 

 rather stout, rough, flattened toward the 

 base, straight at first, frequently some- 

 what twisted when old, about 6-9 mm 

 long: palea a little more than % the 

 length of its glume. 



Southern Europe; introduced sparingly 

 from Maine to Virginia, abundantly on 

 the Pacific coast, from Washington, to 

 Los Angeles, California. 

 BROMUS MAXIMUS Desf. 



Type from northern Africa. Stanford 

 University (C. Ritter 305), California. 

 Var. GUSSONI Pari. 



Bromus g-ussoni Pari Rar. PI. Sic. 2: 

 8 (1840). 



Bromus sterilis Gus Fl. Sic. Prod. 



