GRAMINE.E. (grass FAMILY.) 589 



11. STENOTAPHRUM, Trin. 



Spikelets as in Panicum, placed, either iu pairs with one pedicellate and 

 sterile, or 4-6, and all sessile and fertile, in excavations of the broad flattened 

 jointless rachis. Grasses with creeping culms, and flat or folded leaves. 



1. S. Araericanura, Schrank. Culm compressed ; flowering branches 

 erect, 6'- 12' high ; leaves linear, obtuse; spikes pedicelled, lateral and ter- 

 minal, 2' - 5' long ; spikelets in pairs, the sterile one neutral, its palet cori- 

 aceous. — Damp ground along the coast. June - July. 



12. LEERSIA, Swartz. Cdt Grass. 



Perennial aquatic or marsh grasses, with the leaves and sheaths more or less 

 roughened by minute curved points, the 1-flowered spikelets compressed and 

 imbricated along the sleuder branches of the mostly simple panicle. Sterile 

 glumes none, the floret chartaceous, flat or conduplicate, mostly hispid-ciliate 

 on the keel. Stamens 1-6. Grain compressed. 



1. L. oryzoides, Swartz. Culms branching and prostrate below, 3°- 

 4° long; leaves and sheaths very scabrous; panicle large, diffuse, its base 

 mostly included; spikelets oblong-lanceolate, flat, 2" long; stamens 3. — 

 Swamps and ponds, common. 



2. L. Virginica, WiUd. Culms branching, weak and reclining, 2°- 3° 

 long; leaves linear ; panicle simple, exserted ; spikelets oblong, concave, 1" 

 long ; stamens 1-2. — With the preceding, common. 



3. L. lenticularis, Michx. Culms erect, simple, 2° -3° high; leaves 

 lanceolate ; panicle simple, spreading ; spikelets oval, flat, 2^" long ; stamens 

 2. — Wet or marshy banks, Florida to North Carolina. 



4. L. monandra, Swartz. Culms l°-3° high, slender; leaves linear, 

 the sheaths smooth; panicle long-exserted, sparingly branched ; spikelets 1" 

 long, oval, acute, smooth ; stamen 1. — Coast of South Florida, and westward. 



5. L. hexandra, Swartz. Culms 2°- 6° long, branching; leaves and 

 sheaths smooth or scaljrous; panicle contracted, short branched, exserted; 

 spikelets lanceolate, 2'' long ; stamens 6. — Lakes and ponds, often in deep 

 water, Florida, and westward, near the coast. 



13. LUZIOLA, Juss. 



Perennial marsh or aquatic grasses, with narrow elongated leaves, and pan- 

 icled monoecious inflorescence, the pistillate and staminate spikelets in separate 

 panicles. Spikelets 1-flowered. Glumes 2, nearly equal. Stamens 5-11. 

 Styles 2, the stigmas plumose. Grain ovoid, free. 



1. L. Alabamensis, Chapm. Glabrous; culms very short; leaves 

 mostly 2, linear, the lower elongated, its long sheath including the peduncle 

 of the simple few-flowered panicle ; glumes of the staminate spikelet 7-nerved, 

 of the pistillate 11 - 13-nerved. — South Alabama and Mississippi. Rare. 



14. HYDROCHLOA, Beauv. 



A small floating or creeping grass, with short oblong-linear flat leaves, and 

 simple spikes of 3-4 small monoecious 1-flowered (white) spikelets, mostly 



