35 2 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



Guadua latifolia H. B. K. ? Syn. PI. i. 254. 



Merida, Jan. 1866, lacking inflorescence (Schott, num. amiss.}. 



Gouinia latifolia (Griseb.) Vasey. Rose in Contrib. Natl. Herb., 



i- 3 6 5- 



Tricuspis (Neuroblepharum) latifolium Griseb., PI. Lorentz, 

 259. Nohcacab, Nov. 25, 1865 (Schott, 



Gouinia virgata (Presl.) Scribn. U. S. Dept. Agr. Div. Agrost. 

 Bull. 4, 10. 



Bromns virgatus Presl. Rel. Haenk., 263. Gouinia poly gama. 



Fourn. Enum. PI. Mex. Gram., 103. Tekax, Sept. (1033). 



Ichuauthus lanceolatus Scribn. & Sm. Xcanchim. 



"An erect or ascending, caespitose, branching perennial i to 



2 feet high, with lanceolate leaves and simple panicles of few 

 loosely flowered racemes. Sheaths shorter than the internodes, 

 ciliate along the margins, otherwise smooth, or the lowermost 

 pubescent; ligule a short ciliate fringe of hairs; leaf blade i to 



3 inches long, ^ to ^ inch wide, lanceolate acute, smooth, 

 many nerved, with a narrow cartilaginous margin abruptly nar- 

 rowed at the base, this contraction forming in the lower leaves, 

 especially those of the sterile shoots, a slender channeled petiole, 

 which, like the sheaths, is ciliate along the margins. Panicle 

 branches, erect or ascending (spreading in anthesis), i to 2 

 inches long, the uppermost shorter. Spikelets in pairs, one sub- 

 sessile, the other raised on a pedicel about as long as itself. 

 Spikelets ovate-lanceolate, acute, glabrous, about 2 lines long; 

 first glume ovate, acute, strongly 3-nerved, one-half to three- 

 fourths the length of the spikelet, scabrous on the mid-nerve 

 above; second glume ovate-lanceolate, acuminate, 5-nerved, 

 nearly clasping the similar empty third glume ; base of the 

 fourth glume surrounded by the third; fourth glume about 1.5 

 lines long, oblong-lanceolate obtuse, 5-nerved, very smooth and' 

 closely rolled about the palea, which is of similar texture. " Old 

 fields about Jzamal, No. 854. George F. Gaumer, September, 

 1895. Yucatan." Scribner & Smith, U. S. Dept. Agric. Div. 

 Agrost. Bull. 4, Feb. 6, 1897, p. 36. "Common in the forests 

 of Buena Vista Xbac," Sept. (mi). This is the Panicum sp. 

 of p. 288, these contributions. 



LEPTOCHLOA MUCRONATA Kth. Rev. Gram, i, 91. 



Environs of Merida (Schott, May 1865, 401 ; July 1865,^07, 

 590 ; Nov. 1865, / 



Oplismenus Burmannii (R. Br.) Beauv., Agrost., 54. 



Orthopogon R. Br. , Prod., 194. "In shady places, 3 feet high, 

 common about the mouths of caves and around cenotes and 

 aguadas near Izamal," Oct. (1038). Merida at the Quinta del 

 Obispo, Nov. 1864 ; and Merida, July 1865 (Schott, 55, 384.} 



In Dr. Schott's 384 and Dr. Gaumer's 1038 the spikelets are 

 somewhat larger and the foliage larger and denser than in Dr. 



