No. fiO. 

 TRISETUM BARBATUM Stend. Syii. PI. Gram. 229 (18.5.-)). 



Plant ])('roiinial, f't'W culiiis in a stool, witli fibrous roots. 



Chillis erect, or (Ifciuubciit at the base, oltcii branched below, smooth, leafy nearly 

 to the panicle, 2 to 3 feet tall. 



/v^fircv of th(^ culm 3 or 4; slieaths s])arsely rotrorsely liis])id, lialf ojicii above, 

 shoi'ter tliaii the iiiteriiodcs; Ithidcs scabrid, sparsely haii-y or nearly smooth, 2 to 3 

 lines wide, ;5 to (! inches long; lignle obtuse, erose, 1 line or less long. 



InJIiirrHccnve a loose, ()j)en, oi' often rather constricted, erect or llexuous jianiele 

 4 to S inches long; rays 2 to 5 at each of tln^ 4 to (J nodes, scabrid liki' the axis? 

 unequal, 3 inclies long or less, sjiikelet-bcaring toward the ends. 



ISpikelels loosely 3 to 6-tlowered, 7 to 10 lines hnig; first empty glume very nar- 

 rowly ovate, snbnlate-acute, carinate, mend)ianaceous and smooth, except the jiromi- 

 nent, slightly hisi)id keel, 3 to 4 lines long; second empty glume lance-ovate, acute, 

 often involute subulatt^ slightly hispid on the keel, 3-ncrved, '» to <• lines long; floral 

 glume lam-eolate, with two teeth, each about h line long, at the apex, ]mbes(!ent 

 throughout, 5- to 7-nerved, ."> to 7 lines long; awn arising at the base of the sinus, 

 rather coarse, his])id and slightly twisted below, bent, i to '-\ inch long; palet linear, 

 thin, eiliateon the keels above, 4to51inea long; grain spindle-shaped, reddish-brown, 

 subtranslnceiit, 3 to 4 lines long; internode of rachilla slender, about l.t lim's long. 



Plate LX; «, first empty glume; b, second empty glume; v, floral glume, side 

 view; </, floral glume, dorsal view; r, ])alet, not opened; ./', grain. 



Southern California. The descrii>tit)n in P>otaiiy of California seems to include in 

 some characters the variety mnjor Vasey, which differs from the type in having larger 

 spikelets and broader empty glnmesmoie or less plainly .3- and 5 nerved, r»'spectively. 



Prof. TInirber, in Botany of Califoinia, is authority for the reference of this species 

 to T. Iiurhutum Stendel, and only from description. The nann- does not occur in Fonr- 

 uier's Graminees Mexicaiues, and we have seen no authentic specinu-nsof the species. 



