CATALOGUE. 295 



Beckmannia eeuc^fobmis, Host. (Watson's Botany of 40th Parallel, 

 Synopsis Flora of Colorado). — Saguache Creek, Colorado, 1873 (1177). 

 Zuni, N. Mex., 1874 (163). 



Panicum obtusum, H. B. K. — Culms erect, about 18' high, rather 

 rigid; leaves linear, rigid, 3-6' long; sheaths smooth; panicle erect, 5-6' 

 long, of 5-7 appressed branches; spikelets in pairs, sub -imbricated, obovate, 

 obtuse, smooth; inferior flower of 2 palets, triandrous; perfect flower nar- 

 row, longitudinally striate. Plant glabrous and somewhat glaucous. Rachis 

 narrowly linear, very flexuous. — Sulphur Springs, Arizona, 1874 (549). 



Panicum maximum, var. bulbosum, Jacq. — Root bulbous; culm erect, 

 3—4° high, rather wiry, naked above, glabrous; leaves narrowly linear, 

 erect, 3-4' long, smooth, or somewhat scabrous ; panicle 3-6' long, 

 strict; rays mostly single, strict, distant, branched to the base, sparsely 

 flowered; spikelets mostly sessile, or very short-peduncled, ovate, acutish; 

 glumes thin, purplish, obtuse, the lower about half as long as the perfect 

 flower, upper one 5-nerved ; sterile flower of two thin palets ; perfect 

 flower ovate-oblong, smooth. — Rocky Canon, Arizona, 1874 (296 and 298). 



Panicum Ceus-galli, L. — Camp Crittenden, Arizona, 1874 (668). 



Panicum leucoph^um, H. B. K. (P. lachnanthum, Torr.) — Culm 

 ascending, branched below, glabrous, l£-2° long; leaves flat, 4-6' long; 

 sheaths hairy; panicle oblong, erect, 3-6', the branches alternate and 

 loosely racemose ; all the spikelets pedicellate, oblong ; inferior glume 

 very short, glabrous ; the superior and the inferior palet of the abortive 

 flower much attenuate and somewhat awned at the tip, densely cov- 

 ered with very long, white, silky hairs ; perfect flower ovate-lanceolate, 

 acuminate and mucronate, glabrous, finely striate, and dotted longi- 

 tudinally. — Arizona, 1871 and 1872. Camp Bowie, Arizona, 1874 (489). 



Setaeia caudata, R. & S. — Culm erect, 2°, flattened below, leafy; 

 leaves and sheaths retrorsely scabrous, flat, hairy at the mouth of the 

 sheath, upper leaves involute-pointed ; panicle cylindrical, 4-6' long, 

 dense or loose and interrupted, pale green ; spikelets glomerate, oblong, 

 acutish, 1" long; glumes herbaceo-membranaceous, cordate, mucronu- 

 late, lower one ^ to J as long as the upper, upper One 5-7-nerved, per- 

 fect flowers ovate, acute, finely punctate ; bristles upwardly serrulate, 



