282 



Colleetcd by Dr. Edward Palmer at Tequila in 1886. This is near Setaria 

 oirrhosa Fourn., but differs in its very stout culm, and tho length of the lower 

 glume. 

 Aristida (Ortachne) manzanilloana sp. nov. App.arently amiuid ; culms tufted, 2 

 to 2^ feet high, smooth, slender, erect, simple, or geniculate and branching 

 below; leaves 2 to 3 inches long, plane below, conduplicate above, not rigid, 

 very narrow, almost setaceous; sheaths shorter than tho blade; panicle race- 

 mose, simple, 4 to 5 inches long; brandies single, or 2 or 3 together, the lower 

 about 1 inch long, sessile, with 3 to 5 somewhat crowded spikolets; emi)ty 

 glumes about 3 lines long, awn-pointed, nearly equal; floral glume with the 

 undivided awn about 1 inch long when mature, scabrous on the keel, not twisted, 

 flattish, commonly curved above. 



Collected in the mountains about Manzanillo by Dr. Edward Palmer, Decem- 

 ber 1 to 31, 1891 (No. 1084). This species differs from A. tenuis variety flexvom in its 

 culms being slender and flexuous, leaves softer, and spikelets witha fewscattered 

 hairs. 

 Aristida appressa sp. nov. Culms 2 to 4 feet high, slender, smooth; lower leaves 

 not seen, the upper ones narrowly setaceous, erect, 4 to 6 inches long; panicle 8 

 to 12 inches long, narrow; tho branches alternate or in twos, apprcssed, the 

 lower 3 to 4 inches long, naked below, above subdivided, with appressed spike- 

 lets; empty glumes equal or nearly equal, about 5 lines long, setaceously 

 pointed, scabrous on the keel ; iloral glume 3 times longer, slender, purple, some- 

 what twisted below the awns, which are nearly equal, the lateral ones about 5 

 lines and the middle one about 6 lines long. 



Collected at Guadalajara by Dr. Edward Palmer in 1885. Dr. Palmer states 

 that the long slender culms are collected by the natives and tied together in 

 bundles for brooms. 



Variety brevior var. nov. Culms tufted and strongly rooted, 2 to 3 feet high, 

 with 3 or 4 leaves, 6 to 10 inches long, flat, the upper becoming involute, sheaths 

 glabrous; ligule obsolete; panicle 8 to 10 inches l<mg, the branches apprcssed; 

 epikelets nearly as in the preceding, but the floral glume little longer than the 

 empty ones, the awns a little longer and nearly equal. 



Collected at Kio Blanco by Dr. Edward Palmer (No. 516) in 1886. 

 Muhlenbergia flavida sp. nov. Annual ; culms weak, decumbent, and much 

 branched below, 12 to 15 inches long, the lateral branches sometimes one-half as 

 long; leaves narrowly linear, 2 to 4 inches long; sheaths shorter than the inior- 

 nodcs, smooth; ligule narrow, 1 to 2 lines long; panicle 5 to 6 inches long, lax 

 and open; the branches scatttTcd, mostly single, capillary, rarely subdivided, 1 

 to 1^ inches long, very slender and racemosely flowered above, naked below; 

 spikelets on short pedicels, alternate, rather distant below, approximate above ; 

 empty glumes equal, ovate at base, tapering to an awn-like point, witli the 

 points reaching to the middle of the floral glume, Avhich is eIli])tic-oblong, flat- 

 tish, 1 line long, 3-nerved, minutely pubescent on the nerves, yellowish, with an 

 awn about as long as its glume; palct as long as the glume, bitid at the apex. 



Collected at Kio Blanco by Dr. Eilward Palmer (No. 645) in 1886. 

 Muhleubergia elata sp. nov. Culms densely tufted, strongly rooted, 4 to 6 feon 

 high, smooth ; radical leaves 1 to 2 feet long, flat and narrow below, setaceous- 

 involute above; ligule about 3 linos long, pointed, docurrent; panicle 1 to 2 feet 

 long, spreading, flexuous; the main axis scabrous, the branches scattered, erect- 

 spreading, single or semiverticillate, capillary, 4 to 6 inches long, subdivided 

 nearly to the base, the branchlets sparsely flowered; spikelets on long pedicels; 

 empty glumes about 1 line long, narrow, nearly half as long as the spikelet, one 

 or both short-awned; floral glumes linear, 1^ lines long, acuminate into a fin* 

 straight awn 3 to 4 lines long. 



