No. IS. 

 ORYZOPSIS WEBBERI (Tbuil..) V;iscy. I'.nll. Toir. Club, xv. 49. 



riiiiil perennial, densely cespitose. 



(Jiiliitx erect, slender, tlii<kened at the base, wiry, terete, his])idnl()us, ."5 to !> inches 

 Uifili. covered at base witli nuuierons scarions, brown, shiny, sniootli sheaths, naked 

 only liclow tiic njtper sheath. 



Leaves from the base niunerons, filit'orni convohite, rigi<l, scabrous, often cillate 

 near the base, .'i to 4 inches long. Leaves of cnlin 2 or .'5 below, and 1 or often 1' or :i 

 somewhat fascicleil above; lower sheaths close, slightly hi;:pid, overlajjping, with 

 blades like those of tiie ladical leaves bnt not exceedini;- tlicm; nppcr slieatli or 

 fascicle of sheiitlis dilatcil, nearly smooth, with an erect, convolute, rigid, deciduous 

 blade scarcely equaling the panicle; ligule obscure or the upper ones merabranai-eous, 

 obli(|iic, less than \ line long. 



Injlonsvciice a narrow, somewhat secund panicle, or often of 2 to 4 nearly tMpial 

 erect branches li to 3 inches long, included at base, rays in twos or threes, erect, bear- 

 ing one or two spikelets on clavate ])edi<-els. 



SpihTkt-s oblanceolate, l-Uowered ; empty glumes spreading, lanceolate, acuminate, 

 meml)ranace()us above, often imrple-tinged, smooth, 3-nerved, eciual, 4 lines long; stipe 

 oblii|ne. obconical, acute, bearded throughout like the glume, J line long; floret spin- 

 dle-shaped, 2.J to 2.] lines h)ng, A line thick; Horal glume coriaceous, yellow when 

 mature, densely clothed throughout with erect, white, persistent hairs 1 to li lines 

 long, H-nerved, the lateral nerves uniting with the midnerve above; awn minutely sca- 

 brous, twisted, bent, .'{ to ."> lines long, caducous; ])alet 2 lines long, chartacetms and 

 bearded like the glume, especially ahovi^ lodicules 2. linear. J line long; anthers 

 naked; grain broadly spindleslciped, nearly smooth, dark brown, ojiaci tie, nearly 2 

 lines long and ^ as thick. 



IM.ATH XVIII: (/. spikclct enlarged '■> times; «', spikelet before the awi lias 

 dro|ip('(l: /(. emjjty yluiiics: c, floret : '/, i)alet. 



California and Nevada. A rare species, reported by Imt two or three collectors. 



