13 



14 



Suppl. 1: 27 (1832). 



Larger than the type, 4-7 dm. tall, 

 larger and more lax panicle, 1-2 dm. long, 

 with the upper part somewhat drooping. 



Arizona, California, Washington. In- 

 cutt 1059). 



.troduced. San Diego, California (Or- 

 BROMUS RUBENS L. 

 BROMUS ORCUTTIANUS Vasey. 



"Culms 3-4 ft high, erect, leafy below, 

 scabrous above: lvs 4-6 in. long, erect, 

 rather rigid, smooth except on the mar- 

 gins; ligule short, obtuse, somewhat car- 

 tilaginous: panicle 4-6 lines long, erect, 

 rather scabrous, the branches short (1-2 

 Jn. long). , in twos or threes, rigidly 

 spreading horizontally, sparsely fi'd: 

 spikelets 2-5 fl'd, short-pedicelled: outer 

 glumes smoothish, scabrous on tne 

 nerves: the upper one oblong-lanceolate, 

 5-6 lines long, 3-nerved, obtuse; the lower 

 one % .shorter. 1-nerved, narrower and 

 acute: n'ng glumes scabrous-pubescent, 

 5-nerved, rounded on the back, acutish; 

 awn 2-4 lines long: palet rather shorter 

 than the glumes, sparsely ciliate on the 

 keels."— Vasev. bot gaz 10:223. Smith mt, 

 S D Co (H. C. Orcutt): Mt. Adams, 

 Wash. (Suksdorf). 

 Var. GRANDIS Shear. 

 Variety ASIMILIS Davy. 

 BROMUS TRINII Desv. 



Trisetum hirtum Trin Linnaea 10:300 

 (1835). 



Trisetum barbatum Steud Syn PI Gram 

 229 (1854). 



Bromus barbatoides Beal Grass N A 

 2:614 (1896). 



California; Colorado; Chili. 

 Var. PALLIDIFLORUS Desv. 



Bromua barbatoridea sulcatus Beal 

 grass N A 2:615 (1896). 



Trisetum barbatum major Vasey in 

 herb: Beal Grass N. A. 2:615 (1896). 

 BROMUS UNIOLOIDES HBK. 



Annual, or sometimes perennial, 3-4 ft. 

 high, seyeral stems from same base; 

 panicle large and spreading, spikelets 

 about 1 inch long, 14 wide, composed of 

 7-10 florets overlapping each, other; 

 flowering glumes coarse in texture, 

 strongly nerved, usually bearing a short 

 arm about 3 mm. long. Rescue grass. 

 Widely distributed in South and Central 

 America, Mexico, Southern Texas, and 

 naturalized or cultivated in the southern 

 United States, Europe, and Australia. 

 Known also by the names Iverson's, 

 California prairie, Schrader's brome, and 

 Arctic, grass, Australian oats, etc. 



Shear, cir 26 agr D-A, f. 



Genus CALAMAGROSTIS Adans. 



CALAMAGROSTIS DENSUS Vasey. 



"Culms in large patches, from strong 

 roctstocks, 3-4 ft high, robust, leafy, 5-6 

 nodes; the lower sheaths loose and longer 

 than the internodes, the middle ones 

 shorter than the internodes, the upper 

 including the base of the panicle; lvs 

 often a foot long, rigid, plane or becom- 

 ing somewhat involute at the long slen- 

 der points, somewhat scabrous, as are 

 the sheaths; ligule 1 line long, lacerate: 

 panicle strict, lance-oblong, 4-6 in. long, 

 rachis 1 slightly scabrous, branches some- 



what verticillate, appressed, 1 line long 

 and densely fl'd: spikelets crowded, 2-2% 

 lines long; outer glumes linear-lanceolate, 

 nearly equal, acute, slightly scabrous, 

 margins slightly scarious; third (or fl'ng) 

 glume a litle shorter, narrow, apex slight- 

 ly toothed and mucronate, a few short 

 hairs at the base; awn, twisted near the 

 base, a little longer than its glume; palet 

 a little shorter than the glume, thin; 

 sterile tuft, slender, one-third to one-half 

 as long as the glumes, with few hairs." — 

 Vasey, bot gaz 16:147. Julian, S D Co (Or)/ 

 CALAMAGROSTIS KAELERIOIDES 



Vasey. 



"Culms erect, 2 ft high, rather rigid, 

 smooth: lvs 2-6 in. long, narrow, some- 

 what scabrous, ligule conspicuous, lacin- 

 iate, blade rigid, pointed, the upper very 

 short: panicle spike-like, narrow, 3-4 in. 

 lcng, the branches in short, approximate 

 (or at the base rather distant) clusters: 

 snikelets about 2 lines long, linear-lance- 

 olate, rather smaller, but otherwise much 

 as in Calamagrostis densus; the panicle 

 having much the appearance of Koeleria 

 cristata," — Vasev. bot gaz 16:147. Julian, 

 S D Co (Or). 

 CEiNCHRUS PALMERI Vasey. 



Calmalli (Orcutt 2573). 

 CHAELOCHLOA GLAUCA Scribn. 



Setaria glauca Beauv Agrost 51 (1812). 



Panicum glaucum L. sp. PI 56 (1753). 



Chamaeraphis glauca Kuntze Rev. Gen. 

 PI. 2: 767 (1891). 



Ixophorus glaucus Nash Torr bot. cl. b. 

 22:423 (1895). 

 CHAETOCHLOA IMBERBIS Scribn. 



Scribner. L T S D-A agr b 4:39. 



Parish. Erythea 7:S9. . Locally intro- 

 duced at Los Angeles CHasse; Davidson). 



Setaria imberbis R-S Sys 2:S9. 



Setaria caudata Davidson, PI L A Co 

 31, not R-S. 



CENCHRUS TRIBULOIDES L. 

 New England: Baia: Arizona. 

 CHLORIS ELEGAXS HBK. 



Ft. Yuma, Cal. (Or 2082). Mexico. 

 Genus CI1YNA Linnaeus. 



CYNODON DACTYLON Pers. 

 S D! Cosmopolitan. 



Genus DACTYLIS Linnaens 



DACTYLIS GLOMERATA L. 



Europe. Asia; widelv naturalized. 

 DANTHONIA CALIFORNICA Bol. 



San Diego to Oregon. 

 DESCHAMPSIA CAESPITOSA Beauv. 

 DESCHAMPSIA CALYCINA Presl. 



Bear; Panamint mts (Coville). 

 DESCHAMPSIA GRACILIS Vasey. 

 DIPLACHNE IMBRICATA Scribn. 

 Leptochloa imbricata Thurber. 

 S Ber (W. G. Wright); Texas; Baja. 

 Ft. Yuma, Cal (Or 2080). 



Genns DISTICHLIS RannesQ. 



DISTICHLIS MARITIMA Raf. 



Uniola spicata L. 



Distichlis spicata Greene. Cal ac b 1:415. 



Chollas (Or 504): Baja mts (Or 1161). 

 EATONIA OBTUSATA A. Gray. 



San Bernardino. Cal. (Parish). 



Genns ELYMUS Linnaeus. 



ELYMUS AMERICANUS Vasey. 

 Sauzal, Baja (Or 1427). 



