POACEAE 111 
1. Hydrochloa flùitans ( Michx.) Nash. Floating or creeping. Stems 1 m. long or 
less, slender, much branched : leaf-sheaths sparingly pilose at the summit ; blades 1-4 cm. 
long, 1.5-4 mm. wide: staminate spikelets 4.5-5 mm. long: stamens about 3 mm. long: 
pistillate spikelets about 2.5 mm. long. 
In water or on muddy banks, North Carolina to Florida. Summer and fall. 
43. PHARUS L. 
Monoecious, usually tall, grasses, with ample panicles and large oblique long-petiolate 
feather-veined leaf-blades with numerous veinlets, the petioles twisted, hence reversing the 
leaf. Spikelets articulated below the scales, of two kinds, in pairs upon the branches of 
the panicle, one sessile, pistillate, the other much smaller, pedicellate, staminate. Scales 
3; in the staminate spikelets membranous, somewhat broadened, the 2 outer empty, the 
first a little shorter, the second longer than the flowering scale; the third scale en- 
closing a flower but no palet ; in the pistillate spikelets the outer two scales membranous, 
empty, many-nerved, subequal, the third scale much longer than the others, narrow, 
at length indurated, nearly closed by the involute margins, enfolding a 2-toothed mem- 
branous palet which is convolute around the flower. Stamens 6. Styles filiform, elongated, 
united to near the apex. Stigmas papillose. 
1. Pharus latifolia L. A leafy perennial. Stems 6-10 dm. tall: leaf-sheaths longer 
than the internodes, concealing the stems; petiole-like base of the blades 1-5 cm. long; 
blades oblanceolate to elliptic, acute, commonly 1-2 dm. long, 3-4 cm. wide: panicle 1-2 
dm. long, its branches finally widely spreading : sessile spikelet about 9 mm. long, the 
empty scales brown, acute, the flowering scale about twice as long as the empty ones, 
cylindrie, about 1.5 mm. in diameter, densely pubescent with spreading glandular-tipped 
hairs, abruptly acute at the naked apex ; pistillate spikelet 3-5 mm. long, the apex about 
reaching the summit of the sessile spikelet. 
In hammocks, near Orange Lake, Florida. Summer. 
44. LUZÍOLA Juss. 
Creeping monoecious marsh or aquatic grasses, with flat leaf-blades and open terminal or 
lateral panicles. Spikelets small, articulated below the scales, 1-flowered, the staminate 
and smaller pistillate in separate panicles. Scales 2, awnless; in the staminate spikelet 
thin-membranous, the first empty, broader but scarcely shorter than the second which en- 
closes a flower but no palet; in the pistillate spikelet membranous, the first scale striately 
many-nerved, broader than the second which encloses a flower. Stamens 6-18. Styles 
short, distinet. Stigmas plumose with simple hairs. 
Staminate and pistillate spikelets borne in panicles on different stems: pistillate ; 
spikelets less than 3 mm. long. 1. L. Peruviana. 
Staminate and pistillate spikelets borne in separate panicles on the same stem: à 
pistillate spikelets about 4 mm. long. 2. L. Alabamensis. 
1. Luziola Peruviàna Pers. Stems finally branching and rooting at the lower 
nodes, 4 dm. long or less: leaf-blades elongated and narrow: staminate panicles 3-6 cm. 
long, the branches erect, the spikelets about 6 mm. long: pistillate panicles 4-6 cm. long, 
the branches spreading or ascending, the spikelets 2-2.5 mm. long. 
In ditches and in wet usually grassy places, Louisiana. Summer and fall. 
2. Luziola Alabaménsis Chapm. Stems finally branching and rooting at the lower 
nodes, 1-3 dm. long: leaf-blades elongated and narrow, usually much exceeding the pan- 
icles : panicles 3-8 cm. long, often included below in the upper leaf-sheath, the branches 
commonly ascending or erect : staminate spikelets 5-6 mm. long : pistillate spikelets about 
4 mm. long. 
In wet places, Alabama and Mississippi. Summer and fall. 
45. ZIZANIÓPSIS Doell & Aschers. 
Tall robust perennial monoecious aquatie grasses, with creeping rootstocks, long flat 
leaf-blades and ample terminal panicles. Spikelets with a more or less prominent carti- 
laginous ring at the base, 1-flowered, narrow, articulated below the scales, flattened, of 2 
kinds, the staminate at the base of, the pistillate terminating, the branches of the narrow 
panicle. Scales 2, membranous, concave, acute, the first empty, awned in the pistillate 
spikelets, a little broader than the scarcely shorter awnless second scale which encloses a 
flower but no palet. Stamens 6. Styles united. Stigmas plumose with short hairs. 
