DESCRIPTIONS OF NEW GRASSES FROM MEXICO. 



By George Vaskt. 



Paspalum pauclsplcatum sp. nov. Culms rooting at the lower nodes, ascending, 

 about 2 feet high, nodes pubescent ; leaves of culm 4 to 8 inches long, 3 to 51ine8 

 wide, smooth; panicle of 2 to 3 approximate, erect, straight spikes, 3 to 3^ 

 inches long; spikelets in 4 rows, elliptical- oblong, 1|- lines long, acute, the 

 outer glume minutely puberulent, 3-nerved; inner empty glume glabrous; per- 

 fect flower whitish, longitudinally striate. 



Collected at Guadalajara by Dr. Edward Palmer (No. 243) in 1886. 



Paspalum inops sp. nov. Culms 9 to 12 inches high, slender; leaves 2 to 4 IncheB 

 long, 2 to 4 lines wide, villose with scattered hairs, the upper very short or 

 wanting the blade ; sheaths villose; panicleconsistingof about 2 spikes, approx- 

 imate, about 1 inch long, the rachis narrow, spikelets in two rows, roundish- 

 obovate, pale, smooth, or minutely pubescent, little more than 1 line long. 

 Collected at Guadalajara by Dr. Edward Palmer (No. 592) in 1886. 



Paspalum culiacanuni sp. nov. Apparently annual ; culms erect, 1^ to 2 feet high, 

 leafy, smootli, ratlier slender; leaves linear-lanceolate, 6 to 10 inches long, acumi- 

 nate, 4 to 6 lines wide, smootliisli or somewhat scabrous; lower sheaths open and 

 free when mature, compressed; ligule fimbriate; spikes 3 to 5, rarely 2; l^ to 2i 

 inches long, rather loosely flowered, spreading, arcuate, 1 to f inch distant; 

 rachis narrower thau the spikelets, scabrous; spikelets in 2 series, mostly in 

 pairs, occasionally with a small additional lower glume, about 1 line long, 

 oblong, obtuse, smooth. 



Collected by Dr. Edward Palmer in the mountains of Culiacan (No. 1647) in 

 1891. Has somewhat the appearance of F. l<Bve, but with shorter, more approxi- 

 mate spikes, and smaller spikelets. 



Panicum (Ptychophyllum) palmeri sp. nov. Annual; culms robust, 4 to 6 feet 

 high, leafy ; leaves 1 to 1^ feet long, 1 to 1^ inches wide, acuminate, with about 

 15 principal nerves, scabrous on the margins; ligule short, incised; panicle 

 racemose, 6 to 10 inches long, 2 to 3 inches wide, the simple erect branches scat- 

 tered unequally and singly along the rachis, unequal, gradually diminishing 

 from below to the apex, scabrous, the lower ones 2 to 4 inches long, flowering 

 nearly or quite to the base or sometimes naked at the base; spikelets 2 lines 

 long, conical, one-aided, sessile, crowded, with one bristle at the base of each; 

 first glume ovate, one-fourth as long as the spikelet, 3-nerved; second glume 

 nearly as long as the spikelet, 11- to 13-nerved; third or glume of the male 

 floret the longest and as long as the spikelet; palet nearly as long, 5-nerv6d; 

 perfect floret little more than 1 line long, elliptical, obtuse or subacute; bristles 

 variable, the lower twice as long as the spikelet, the upper ones about equal- 

 ing it. 



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