544 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



coriaceous, smooth and shining, beaked with the persistent style; 

 seed free from the pericarp. Robust perennial marsh grasses, with 

 stout creeping rhizomes, broad flat blades, and large open panicles. 

 Type species, Zizaniopsis microstachya Nees. Name from Zizania, a 



generic name, and Greek opsis, appearance, 

 alluding to the similarity to Zizania. 



1. Zizaniopsis miliacea (Michx.) Doell and 

 Aschers. (Fig. 1144.) Southern wildrice. 

 Culms 1 to 3 m tall or even taller; blades 

 glabrous except the very scabrous margins, 1 to 

 2 cm wide, the midrib stout; panicle rather 

 F,GB S™° no ' narrow, nodding, 30 to 50 cm long, the 



numerous branches fascicled, as much as 15 to 

 20 cm long, naked at base ; spikelets 6 to 8 mm long, short-awned, the 

 staminate slender, the pistillate turgid at maturity. Ql — Marshes, 

 creeks, and river banks, Maryland to Kentucky and Oklahoma, south 

 to Florida and Texas (fig. 1145). 



115. LUZIOLAJuss. 



Spikelets unisexual, 1-flowered, disarticulating from the pedicel, 

 the staminate and pistillate spikelets in separate panicles on the 

 same plant; glumes wanting; lemma and palea about equal, thin, 

 several to many-nerved, lanceolate or oblong; stamens 6 or more; 

 stigmas long, plumose; grain free, globose, finely striate. Creeping, 

 low or delicate perennials, with narrow flat blades and terminal and 

 axillary panicles. Type species, Luziola peruviana. Name modified 

 from Luzula, a genus of Juncaceae. 



Pistillate spikelets ovoid, about 2 mm long; staminate and pistillate panicles on 

 the same shoot 1. L. peruviana. 



Pistillate spikelets oblong-lanceolate, 4 to 5 mm long; staminate and pistillate 

 panicles on different shoots 2. L. bahiensis. 



1. Luziola peruviana Gmel. (Fig. 1146.) Culms slender, branch- 

 ing, the flowering shoots ascending, 10 to 40 cm tall; blades 1 to 4 

 mm wide, exceeding the panicles; staminate panicles terminal, narrow, 

 the spikelets about 7 mm long; pistillate panicles terminal and axil- 

 lary, 3 to 6 cm long, about as wide, the spikelets about 2 mm long, 

 ovoid at maturity, abruptly pointed. < % — Muddy ground and wet 

 meadows, Florida (Pensacola) and Louisiana (vicinity of New Orleans) ; 

 Mexico and Cuba, south to Argentina. 



2. Luziola bahiensis (Steud.) Hitchc. (Fig. 1147.) Extensively 

 stoloniferous, the flowering shoots not more than 15 cm tall, mostly 

 less; blades 2 to 4 mm wide, much exceeding the panicles; panicles 

 mostly terminal, the staminate few-flowered, the spikelets about 5 

 mm long; pistillate panicles 4 to 6 cm long, the few stiff branches 

 finally spreading, with a few appressed oblong-lanceolate spikelets 4 

 to 5 mm long, the lemma and palea much exceeding the caryopsis. 

 % — Lagoons and banks of streams, southern Alabama; Cuba. 



116. HYDROCHLOA Beauv. 



Spikelets unisexual, 1-flowered, disarticulating from the pedicel, 

 the staminate and pistillate spikelets in separate panicles on the same 

 plant; glumes wanting; staminate spikelets with a thin 7-nerved 

 lemma, a 2-nerved palea, and 6 stamens; pistillate spikelets with a 



