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



wanting; lemma and palea about equal, thin, several to many-nerved, lance- 

 olate 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. 

 816.) Culms slender, branching, the 

 flowering shoots ascending, 10 to 40 

 cm. tall; blades 1 to 4 mm. wide, ex- 

 ceeding the panicles; staminate pan- 

 icles terminal, narrow, the spikelets 

 about 7 mm. long; pistillate panicles 

 terminal and axillary, 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 Or- 

 leans); Mexico and Cuba, south to 

 Argentina. 



2. Luziola bahiensis (Steud.) 

 Hitchc. (Fig. 817.) Extensively sto- 

 loniferous, the flowering shoots not 

 more than 15 cm. tall, mostly less; 

 blades 2 to 4 mm. wide, much ex- 

 ceeding the panicles; panicles mostly 

 terminal, the staminate few-flowered, 

 the spikelets about 5 mm. long; pistil- 

 late 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 caryop- 

 sis. % — Lagoons and banks of 

 streams, southern Alabama; Cuba, 

 Venezuela, Brazil. 



124. HYDROCHLOA Beauv. 



Spikelets unisexual, 1-flowered, dis- 

 articulating 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; pistil- 

 late spikelets with a thin 7-nerved 

 lemma and 5-nerved palea, the stig- 

 mas long and slender. A slender, 

 branching, aquatic grass, probably 



Figure 817. — Luziola bahiensis, X 1. (Mohr, Ala.) 



perennial, the leaves floating; stami- 

 nate spikelets in small few-flowered 

 terminal racemes; pistillate spikelets 

 in few-flowered racemes in the axils of 

 the leaves. Type species, Hydrochloa 

 caroliniensis. Name from Greek hudor, 

 water, and chloa, grass, alluding to 

 the habitat. 



1. Hydrochloa caroliniensis Beauv. 

 (Fig. 818.) Culms up to 1 m. or more 

 long, freely branching, leafy; blades 

 flat, 1 to 3 cm. long, 1 to 2 mm. wide, 

 in vigorous shoots as much as 6 cm. 

 long and 5 mm. wide; spikelets incon- 

 spicuous and infrequent, the stami- 

 nate about 4 mm. long, the pistillate 

 about 2 mm. % — Ponds and 

 slow-flowing streams, sometimes in 

 sufficient abundance to become trou- 

 blesome. North Carolina to Florida 

 and Louisiana. Eaten by livestock. 

 Lemma 5- or 7-nerved; palea 4- to 7- 

 nerved. (Weather wax.) 



