425 426 



fig gm pubescent, 5-6 mm Ig; awn slen- Scribner Torr cl b 9:103 (1881). Ha 61. 



der, flexuous, com twice bent, 2-4 cm Ig, Synonymy: Bilfa gracillima Thurber, 



pubescent or plumose below; palea about B 2:268. 



half as Ig as its gm; anth naked. S. aUMIFEXTTS HBK, near Guaymas, 



Cruz; Inyo mts (Coville); north. Son! 



ORYZOPSIS MEMBRANACEA Vasey. SPOROBOLUS RAMULOSUS Kth. 



Stipa membranacea Pursh. Runth, Rev Gram 1:68. B 2:269. 



Eriocoma cuspidata Nuttall, Gen 1:40. Texas to California; Mexico. 



British Columbia to Baja and Texas. SPOROBOLUS WRIGHTII Munro. 



CINNA Linnaeus. Texas to Cal.; "Saccaton or Zacate." 

 Genus EFICAMPES Presl. 



Genus SPOROBOLUS R. Brown. 



Tall per tufted grasses with com 



Per or an grasses with flat or con- very Ig spk-like panicles: spkt sm, Ifld: 



volute Ivs and open or contracted pan- empty gm 2, membranous, slightly un- 



icles; spkt com sm, 1-fld, sometimes 2-3- equal, convex on back, carinate, oft fine- 



fld: gm in the 1-fld spkt 3, membra- ly 3-nerved; flg-gm 3-nerved, obtuse or 



nous; the 2 outer empty, the first some- emarginate, a little sh'er or about equal- 



what shorter; the third equaling or long- ing empty gm, com tipped with a slen- 



er than the empty ones enclosing a pe'r- der rather sh awn; sta 3: sty distinct, 



feet fl and a 2-nerved palea: sta 2-3: sty sh; stig plumose. Grain free, included 



very sh, distinct: grain free. Drop-seed within the gm. 



grass. EPICAMPES RIGENS Benth. 



SPOROBOLUS AIROIDES Thurb. Per, tufted; cu rigid, erect, smooth, 



Per; cu erect, rather stout and tufted, 5-10 dm hi; sheaths Ig'er than inter- 



4-9 dm hi; sheaths somewhat sh'er than nodes, loose, smooth; ligule 4-6 mm Ig; 



internodes, throat cliate; ligule very Ivs scabrous, rigid, involute apex at- 



sh; Ivs convolute, tapering to a filiform tenuate, 1-3 dm Ig; panicle exserted or 



apex, those of the cu 4-5, the upper fili- somewhat included, erect, dense, spk- 



form, 2-3 cm Ig; panicle terminal, ovoid, like, 2-5 dm Ig, 5-8 mm broad; spkt 



oft partly included at base, 2-3 dm Ig, minutely scabrous, elliptic; empty gm 



its branches again branching and bear- w, about 3 mm Ig, nearly equal; flg gm 



ing scattered spkt above the middle; awnless, minutely pubescent, about 2 



spkt light lead-color or brown; empty gm mm Ig. Baja! 



obovate, nerveless, first 0.5-1 mm Ig, Ab 35. "Frequent in the San Gabriel 



second 1.5-2 mm Ig; flg gm concave, mts, in canyons, confined mostly to the 



broadly oval, 1-nerved, 2 mm Ig; palea upper portions of the chaparral belt." 



broader than its gm and a little sh'er, Da 20. 



truncate. Deer-grass. 



AVidely distributed through So Cal.; CD (Parish); Texas. Ha U 58, Jac. 



Occasional in low ground. Wilming- Genus MUHLENBERGIA Trin. 



ton; Westminster; San Bernardino; San Per or ann grasses with convolute or 

 Diego. flat Ivs and paniculate infl: rtstocks oft 



T, Marcy R 300. Ab 334, B 2:269. Da scaly: spkt 1-2-fld: gm 3 or rarely 4; qut- 

 18. er ones empty, membranous or hyaline, 



SPORBOLUS ALTISSIMUS Vasey. acute and sometimes awned; 3d 3-5- 



San Diego (Dr. Edward Palmer). nerved, subtending a palea and perfect 



S.AREITACEUS Buckl, Phil ac pr 1862: fl, obtuse, acute or produced into a capil- 

 89=asperifolius fide IK. B 2:270. lary awn; sta com 3: sty distinct: callus 



SPOROBOLUS ASPERIFOLIUS Thurb. minute: grain nar free, tightly enclosed 



Ness & Meyen, in Nov act Nat Cur 19: in gm. 



suppl 1, 141 (1843). B 2:269. Ab 34. MUHLENBERGIA CALAMAGROSTID- 

 Da 18. Bear. EA Kth. 



Cu branching, 2-4 dm hi, ascending So Cal; Arizona; Comondu, Baja (Br). 

 from stout creeping rtstalks, sheaths MUHLENBERGIA CALIFORNICA Va- 

 smooth, loose, longer than the num sh sey. 



internodes, Ivs flat, scabrous, 3-8 cm Ig, Cu spreading, diffusely branched. 4-8 

 2 mm wide; panicle included at base, dm hi; panicles terminating the Ig, leafy, 

 open, 9-18 cm Ig, its branches scabrous, terminal and lateral branches, 10-15 cm 

 bearing single spkt at ends of very Ig, its branches mostly alt, lower dis- 

 slender stiff branchlets; spkt tinged tant and subspicate; spkt sessile and 

 with p; empty gm lanceolate, 3-nerved, crowded on branches; empty gm mem- 

 first 0.3-0.5 mm Ig, second slightly long- branous except the hispid g keel, equal, 

 er; flg gm oval, obtuse, 1-1.5 mm Ig; lanceolate, acuminate, scarcely 4 mm Ig, 

 palea equaling gm. somewhat exceeding flg gm; flg gm about 



Oregon to Chili; Nebraska. 3 mm Ig, firm, scabrous, acute and ter- 



SPOROBOLUS CRYPTANDRUS A.Gray. minating in a straight awn of about its 

 G, Bot N US, ed 1, 576. B 2:268. own length, sparingly villous at base; 



C D (Or 1491); Oregon; Texas; New En- palea about equaling gm, acute. Ab 32. 

 gland. Muhlenbergia sylvatica Californica 



SPOROBOLUS DEPAUPERATUS Torr. Vasey. Bot gaz 7:93 (1882). 

 Scribner, Torr cl b 9:103 (1882). Ha 61. San Bernardino (Parish). 

 Synonym: Klifa depauperata T. B 2:267. MUHLEOSFBERGIA DEBILIS Trin. 



San Bernardino mts (W. G. Wright). Cu tufted, decumbent at base and 



S. DIFFT7SISSIMT7S Buckl, Phil ac pr much branched, p'ish thruout, 1-4 dm hi; 

 1862:90. B 2:269 as airoides. Ivs 25-50 mm Ig, puberulent; ligule 1 



S. aRACIIiIiIMTJS Vasey, Cat Gr US 44. mm Ig, lacerate; panicle 5-12 cm Ig. com 



