FIELD COLUMBIAN MUSEUM BOTANY, VOL. III. 



second and third equal, short-acuminate, 5-nerved, hispid on the nerves, 



hispidulous between them; fruiting 

 glumes i.i X2.3 mm., pale stramine- 

 ous, elliptic, acute, smooth and shin- 

 ing, minutely pubescent at the sum- 

 mit ; apex of palea not enclosed. 

 Grain translucent, white, ellipsoid, 

 with rounded apex, .9x1. 4 mm., in 

 section unequally biconvex. 



Hab. At the Quinta del Obispo, 

 Merida, Nov., 1864, Schott 42, and 

 June, July, 1865, 51)8; common in 

 old fields about Izamal, 16 inches 

 high, Sept., 1895, Gaunter 850, 2484, 



Chichankanab, 1279, 1280, 1281, 1526, Izamal, 2319, Calotmul 2450. 



Panicum hirticaulum Presl. in Rel. Hank. 1:308. 



Panicle included at base or short exserted, 20-30 cm. long, 10-20 

 cm. wide, freely branching; branches 

 alternate, spreading, 5-15 cm. long, 

 spikelet bearing toward the ends; axis 

 and rachis striate, scabrous. Spikelets 

 tawny green, sometimes tinged with 

 plum color, ovate-lanceolate, acuminate, 

 1.5x3.7 mm., glabrous, on flexuous 

 scabrous pedicels. First glume one-half 

 the length of the spikelet or . longer, 

 acute, y-nerved, second and third equal, 

 9-nerved; fruiting glumes pale brown, 

 oblong-elliptic, subacute, 1.1-1.2x2.2 

 mm., smooth and shining. Grain 

 brownish white, 1x1.5 m rn., oblong- 

 obovoid, in section depressed globose. 



Hab. Chichankanab, Gaumer 

 1501 , a depauperate roadside speci- 

 men growing with Panicum maximum at Izamal, 



Panicum brevifolium L. Sp. PI. 59. 



Panicle included at the base, or short- 

 exserted, 7-16 cm. long, 6-12 cm. wide; 

 axis sparsely pubescent, with long, spread- 

 ing, white hairs ; branches alternate, 

 spreading, 2-8 cm. long; rachis capillary, 

 minutely hispidulous. Spikelets .6x 1.5 

 mm., green or brownish, oval, acute, pu- 

 bescent, on long, flexuous, glabrous pedi- 

 cels. First glume nearly l /z the length of 

 the spikelet, acute, 3-nerved ; second 

 slightly shorter than the third, obtuse, 

 5-nerved; third subacute, 5-nerved; fruit- 

 ing glumes .6x1.5 mm., light brown, 

 oval, acute, minutely papillo-striate. Grain translucent brownish 

 white, ovoid, subacute, -5x.8 mm.; in section reniform-cordate. 



