2 



PANICUM VISCIDELLUM Scribn., sp. n. 



A slender, ascending or erect, finally branching perennial, G-10 dm. liigb, with 

 numerous, bearded nodes, pubescent internodes, pubescent sheaths, lanceo- 

 late, acute, pubescent leaves, and ovate, exserted panicles 5-7 cm. long. 

 Leaves 5-8 cm. long, 1-2 cm. broad, cordate-clasping at the base; ligule 

 pilose. Panicle branches somewhat viscid, the lower ones 2.5-3 cm. long. 

 Spikelets 1.8 mm. long, obovate, obtuse, or subacute, the 7-nerved second 

 and third glumes glabrous or with a few scattering hairs. 



Gravelly banks near Jalapa, State of Vera Cruz, altitude 1,250 m. (4,000 feet). 

 C. G. Pringle, No. 8089. 1899. In thickets near Mirador, October. Lieb- 

 mann. No. 323. 1841. 



Related to P. viscidum, but stems much more slender, leaves shorter and less 

 rigid, panicles smaller, as are also the spikelets, which are "nearly smooth. 

 Fournier in his enumeration of the grasses of Mexico refers this grass to P. 

 commelincefolmm Rudge, and cites P. midtiflorum Ell. and P. microcarpon 

 "Michx."as synonyms. I have not Rudge's work, "Plantse Guianse," in 

 which P. commelincefolmm is ilhistrated, and upon which illustration Foiir- 

 nier based his determination of Liebmann's plant, but oiir grass is certainly 

 not P. midtiflorum Ell. (P. polyanthes Schultes), nor does it agree with 

 available descriptions of P. commelincefolmm. P. microcarpon Ell., Sk. Bot. 

 S. C. & Ga., p. 127, not Muhl., is the grass now usually referred to P. har- 

 bvlatum. Mx. 



PANICUM MULTIRAMEUM Scribn., sp. n. 



A rather slender, tufted perennial, 20-30 cm. long, with the glabrous culms 

 densely fasciculate -branched above, bearded nodes and glabrous or thinly 

 pilose sheaths which are bearded at the throat ; lower ciilm leaves 5-8 cm. long, 

 those on the branches much shorter and narrower, sparingly ciliate near the 

 base, pubescent beneath, minutely scabrous along the margins which are very 

 narrowly cartilaginous. Panicles loosely flowered, 2-4 cm. long; spikelets 

 about 2 mm. long, obtuse, and 7-nerved, the second and third glumes thinly 

 pubescent, the fourth glume subacute ; the broadly obtuse ; first glume one- 

 third to nearly one-half as long as the spikelet. 



Gravelly hills near Jalapa, State of Vera Cruz, altitude 1,250 m. (4,000 feet). 

 C. G. Pringle 7882, 1899. Orizaba, State of Vera Cruz, February 17. 

 Jared G. Smith, No. 593. 1892. 



Allied to Panicum ciliosum Nash but smaller, nodes more distinctly bearded 

 and leaves less ciliate. 



PANICUM ALBOMACULATUM Scribn., sp. n. 



A rather slender, erect, sparingly branched perennial, 6-8 dm. high, with striate 

 sheaths, short, ciliate ligules and spreading panicles 12-16 cm. long. Nodes 

 glabrous, the overlapping margins of the sheaths very densely ciliate or 

 sub-villous. Leaf-blade 7-12 cm. long. 5-10 mm. wide (when dry), very 

 acute, rounded at the somewhat clasping base, scabrous on the nerves below, 

 glabrous above, sharply serrulate scabrous on the narrowly cartilaginous 

 margins which are ciliate near the base. Axis and branches of the panicle 

 glabrous, the lower longer branches 8-10 cm. long. Spikelets ovate, obtuse, 

 2.5 mm. long; first glume obtuse, 1 -nerved, sub-remote, clasping the pedicel, 

 the second and third glumes 7-nerved, thinly pubescent with short hairs, 

 about equaling the smooth and shining fourth glume ; the third glume has 

 a thin, short palea. The exposed portion of the culm and sheaths purplish, 

 the latter (in the type) white-spotted with small, oblong spots or blotches. 



Dry rocky hills, Patzcuaro, State of Michoacan, October 10. C. G. Pringle, No. 

 5203. 1892. 



