45 



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, 

 T-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 

 loner; 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 ORCUTTIANUS Vasey. 



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

 scabrous above: Ivs 4-j in. long, erect, 

 rather rig-id, smooth except on the mar- 

 gii.s: ligule short, obtuse, somewhat car- 

 tilaginous: panicle 4-6 lines long, erect, 

 rather scabrous, the branches short (1-2 

 In. lor-g'i. , in twos or threes, rigidly 

 spreading horizontally, sparsely fl'd: 

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

 glumes smoothish. scabrous on tne 

 nerves; the upper one oblong-lanceolate, 

 5-6 lines long, 2-nerved. obtuse: the lower 

 one \i shorter. 1-nerved. narrower and 

 c^cute: fl'rg glumes scabrous-pubescent, 

 5-nerved. rounded on the back, acutish; 

 awn 2-t lines long: palet rather shorter 

 than the glumes, sparsely ciliate on the 

 keels." Vasey. bot gaz 10:223 Smith mt. 

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

 Wash. (Suksdorf). 

 BROMUS UNIOLOIDES HBK. 



Annual, or sometimes perennial, 3-4 ft. 

 high, several 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 :n 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. 



Shea?, cir 26 agr D-A, f. 

 ALAMAGROSTIS DBNSUS 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; Ivs 

 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 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: Ivs 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. 

 !crg. the branches in short, approximate 

 (or at the base rather distant) clusters: 

 spikelets about 2 lines long, linear-lance- 

 olate, rather smaller, but otherwise much 

 as in Calamagrostis densus; the panicle 

 having much the appearance of Koeleria 

 crlstata." Vasey, bot gaz 16:147. Julian, 

 S D Co (Or). 



ELYML'S ORCUTTIAXUS Vasey. 



"Culms generally several from one root, 

 2 or 3 ft high, rather slender, Ify: noaes 

 4-5: leaves 8-10 in. long, erect but not rig- 

 id, narrow and more or less involute 

 uhen dry, scabrous on the margins, upper 

 leaf equalling or exceeding the culm; 

 sheaths striate. smooth; ligule a short 

 ciliate line or nearly obsolete: spike 4-6 

 in. long, erect, loosely fl'd, with 15-20 

 spikelets, 2 or frequently only 1 at each 

 .ioint. mostly flat and 2-ranked: spikel 1 ts 

 5-7 fl'd: outer glumes linear-lanceolate, 

 rigid, long-pointed. 4-6 lines lorg, 1 or dis- 

 tinctly 3 nerved, equalling or exceeding 

 the lower fls; lower fl'ng glumes 4-5 lines 

 long, rigid, lanceolate, acuminate, round- 

 ed and smooth on the back, finely punc- 

 tate. 5-nerved on the inside, the points 

 scabrous: the upper fl'ng glumes gradu- 

 ally shorter and less pointed, and more 

 scabrous above; palet % to one-third 

 shorter than the glumes. 2-toothed at 

 apex. 2-keeied. the keels ciliate." Vasey, 

 bot eraz 10:25S. S D! El Rar.cho Viejo. Ba- 

 .ia (Br). 



El.YMUS PARISHII Davy & Merrill. 



"Stems tufted. 7-9 dm high, scabrid: Ivs 

 canescently pubescent with spreading 

 hair: ligule a mere ring; blades flat or be- 

 coming involute. 5 mm wide, the upper- 

 most 3.5-7 cm long, the lowest 8-16 cm 

 lor.g: spike 10-16 cm long. 10 mm wide, 

 with somewhat divergent spikelets: 

 spikelets in pairs, the lowest 1-2 cm 

 apart. 1-1.5 cm long excluding the awns. 

 3-5 fl'd: empty glumes 11-16 mm long, 

 about 1 mm wide, awn-pointed: inter- 

 nodes of rachilla 2-3 mm long; fl'ngr 

 glumes scabrous. 10 mm long; awns 2-2.5 

 cm long, scabrous." Davy & -Merrill. 

 Unlv Cal pub bot 1:60. Siskiyou Co; Jac 

 (Hall 2097). 



