206 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 
Endodia Raf., Xeogenyt. 1. 1S25. Based on Lcersia lenticularis, the only 
species mentioned. 
Aplexla Raf., Bull. Bot. Seringe 1: 220. 1830. A single species, Leersia 
virgata (probably a misprint for L, virginica) is included. 
All the species of the United States except Homalocenchrus monan- 
drus (Swartz) Kuntze, a plant of rich woods in southern Florida and 
southern Texas, have creeping rhizomes. Most of them are marsh 
grasses. Homalocenchrus monandrus differs from the other species 
also in having small glabrous spikelets in which the palea is rounded 
on the back and lacks the miclnerve, as in rice. In the other species 
the palea is strongly compressed-keeled and appears to represent a 
bract rather than a prophvllum. 
Homalocenchrus virginicus (Willd.) Brit ton and H. oryzoides 
(L.) Poll. (fig. 123) are common throughout the eastern United 
States in moist soil, the latter often forming distinct zones of vege- 
tation in marshes. The first has spikelets about 3 mm. long and the 
main panicle branches solitary : the second has spikelets about 5 mm. 
long and the lower main panicle branches more than one at the node. 
These species, because of the very scabrous, adhesive blades, are 
called rice cut-grass. The species have no economic importance. 
10. ZIZANIEAE, THE INDIAN-RICE TRIBE. 
104. Zizaniopsis Doell and Aschers. 
Spikelets unisexual, 1-flowered, disarticulating from the pedicel, 
mixed on the same branches of the panicle, the staminate below; 
first glume wanting: second glume T-nerved, short-awned in the 
pistillate spikelets: lemma 3-nerved: palea wanting; stamens six; 
styles rather long, united; caryopsis obo vat e, free, coriaceous, 
smooth and shining, beaked with the persistent style. 
Robust perennial marsh grasses, with stout creeping rhizomes, 
broad fiat blades, and large open panicles. Species three; two in 
South America, one in the United States. 
Type species: Zizania microstacliya Nees. 
Zizaniopsis Doell and Aschers.; Doell in Mart. Fl. Bras. 2 2 : 12, pi. 3. 1871. 
A single species described. 
The only species in the United States is Zizaniopsis miliacea 
(Michx.) Doell and Aschers. (fig. 124). growing in swamps from Vir- 
ginia to Florida and Texas. Like Zizania -pdlmtris^ which it some- 
what resembles, this species may be gregarious over wide areas. It 
has no economic importance except as it may furnish shelter and food 
to water birds. 
105. Zizania L. 
Spikelets unisexual, 1-fiowered, disarticulating from the pedicel: 
staminate spikelet soft, the first glume wanting, the second 5-nerved, 
membranaceous, linear, aciuninate or awn-pointed; lemma about as 
long as the glume, 3-nerved; palea wanting; stamens 6; pistillate 
