302 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
half as long as the spikelet; sterile lemma, 5- to 7-nerved, about as long 
as the fertile lemma, without stamens but with a palea as long as 
the lemma; fertile floret acuminate, not strongly turgid on the 
convex side, obscurely cross-lined (fig. 323). 
Type in the United States National Her- 
barium, no. 1161839, collected in thickets on 
serpentine, ‘‘cuabales’’, Motembo, prov. 
Santa Clara, Cuba, June 27, 1923, by Erik 
L. Ekman (no. 16828). 
Also collected by Dr. Ekman in the Prov- 
ince of Oriente: Holguin, Ekman 3267, 7572; 
Sierra de Nipe, Ekman 2510. 
92. IXOPHORUS Schlecht., Linnaea 
Sli tZ OS eS o2 
Spikelets lanceolate, glabrous, short- 
pediceled, the pedicel bearing a flexuous 
bristle just below the spikelet; first glume 
about one-fourth as long as the spikelet, 
rounded, 3-nerved; second glume and sterile 
lemma equal, pointed, the latter enclosing 
a palea and staminate flower, the palea at 
maturity cartilaginous and winged, much 
wider than the spikelet; fertile floret shorter 
than the sterile lemma, indurate, minutely 
roughened. A succulent annual with flat 
blades and narrow panicles of numerous 
ascending 1-sided racemes along a main axis. 
1. Ixophorus unisetus (Presl) Schlecht., 
Linnaea 31: 420, 747. 1862. 
Urochloa uniseta Presl, Rel. Haenk. 1: 
319. 1830. Mexico. 
Erect or spreading, 50 to 150 cm tall; 
blades 15 to 30 cm or even as much as 60 
cm long, as much as 4 cm wide; panicles 10 
to 20 cm long, the racemes approximate, 3 
to 6 cm long; spikelets about 4 mm long, the 
bristles 3 to 10 mm long (fig. 324). 
Low thickets, ditches, and wet places, at 
low altitudes, Mexico to Colombia; Cuba, 
PIGNaT, Saree Mio ayo” ~«©6introduced or escaped from cultivation. 
Said to have some forage value. 
Cusa: Soledad, Jack 6265, 8318. Santiago delas Vegas, Hitchcock 
23250. Isla de Pinos, Ekman 12178. 
93. PARATHERIA Griseb., Cat. Pl. Cub. 236. 1866 
Inflorescence a spikelike panicle, the solitary spikelets appressed 
to slender erect branches, the ends of the branches produced beyond 
the spikelets as slender bristles, the articulation at the base of the 
branch, this forming a sharp callus below the attached acuminate 
spikelet; glumes minute or obsolete; sterile lemma equaling the sub- 
