No. 16. 

 TRISETUM CALIFORNICUM Vascy. ii. sp. 



I'Iniil aitpiU'ciitly animal, loosely tiiltcd, with iiuiiicroiis slender roots. 



Culms yonicnlatc below, spreading, weak, rather slender, Itranehing, vehety- 

 pubescent near the nodes, JO to 20 inche.s high. 



/yPrtce.sof eulin iisnally .'5; sheaths rather loose, striate, finely ]iubesfont, retrorsely 

 his]iidtilons, the lower shorter than the internodes, the np])ei' longer and usually 

 inclosing the base of the panicle; blades fiat or folded, erect, finely jjubescent, hispidu- 

 lons, 2 to .S inches long, 1 line wide: lignle obliquely obtuse, somewhat lacerate, 1 

 line long or less. 



fiiflorcscciicr a narrow, contracted, loose, tlexuous panicle, .'-! to 4 inches long, 

 somewhat iuterrui)led below; rays erect, mostly in twos, nne(|ual, i to 2 inches long, 

 spikelet-bearing to the base. 



SpiLrh'tsou pedicels .J as long as themselves, obovatc, .'?-or 4-llowered, 2.^ to.! lines 

 long; empty glumes oblanceolate, barely acute or obtuse, scabro-pubcscent, scarious- 

 margined; first glume 3uerved; second glunu^ Ijroader, /)-nerved, 2 lines long; floral 

 glume ovate-laiKM'olate, cleft :J way down from the thin a])ex, smooth, obscurely ."> nerved, 

 2 to2.i lines long; awn attached below the cleft, bent, 3 to 4 lines long; interiiode of 

 rachilla i line long, slightly hairy; palet oblong, spread out above, 2-toothed, thin, 1 

 line long. 



Plate XLVI; figure of the i)lant taken from a rather young and depau])erate 

 specimen; a, spikelet enlarged 7 times; h. empty glumes; c, floral ghunes. side view; 

 (I, i)alet, dorsal view. 



Ijower (Jalifornia near the boundary and probably extending into southern Cali- 

 ortiia. 



