511 
3. C. mysuroides HBK. Culms erect or ascending, 6 to 10 dm. high, often 
glaucous: leaves convolute toward the points or throughout: spike L to 2 dm. long 
of many closely imbricated oblong heads about 4 mm. long; bristles numerous, 
erect; no rigid spines.—Sandy land, near the coast. 
20. STENOTAPHRUM Trin. 
Spikelets 2-flowered, the terminal floret perfect, the lower one stam- 
inate or neutral: the first glume short and obtuse, the second coria- 
ceous, slightly exceeding the two nearly equal florets, the glumes of 
which are coriaceous and the palets membranaceous: spikelets more 
or less imbedded, 2 to 3 together in the broad or thickened rachis which 
is sometimes indistinctly articulated near the top. 
1. S. secundum (Walt.) Kuntze. (Sr. AUGUSTINE Grass.) Culms 2 to3dm. high, 
erect or ascending from creeping stems, compressed, smooth throughout: sheaths 
compressed; leaves flat or with involute margins, obtuse: spikes 6 to 12 cm. long, 
lateral and terminal: spikelets about 5 mm. long. (Jsche@inum secundum Walt. 
Stenotaphrum Americanum Schrank.)—Near the coast. Cultivated in Florida. 
21. ZIZANIA L. (WILD RICE.) 
Spikelets 1-flowered, moncecious in the same panicle; those on the 
upper branches pistillate, awned; those on the lower branches stami- 
nate, awnless; both kinds caducous, the pistillate ones especially so.— 
Tall reed-like grasses. 
1. Z. aquatica L. Culmserect, simple, 1 to 3m. high: panicle 3 to 6 dm. long, 
pyramidal; the staminate portion spreading below the erect plume-like pistillate 
portion: pistillate spikelets 1 to 2 cm. long exclusive of the persistent awn.—Along 
the edges of streams, or in water 3 to 10 dm. deep. 
22. ZIZANIOPSIS Doell & Aschs. 
Spikelets 1-flowered, moncecious, the staminate spikelets near the 
bases and the pistillate spikelets near the extremities of the branches 
throughout the panicle, caducous. 
1. Z. miliacea (Michx) Doell & Asch, Culms 1 to 3 m. high, simple: panicle 4 to 
8 dm. long; branches all spreading: spikelets 5 to 7 mm. long; pistillate spikelet 
turgid, short-awned. (Zizania miliacea Michx.)—Margins of streams and ponds in shal- 
low water. 
23. HOMALOCENCHRUS Mieg. (CUT GRAss.) 
Spikelets flat, more or less imbricated, in clusters on short articulate 
pedicels near the ends of the branches, 1-flowered, perfect but often 
failing to mature seed: glumes 2, hispid on the margins and nerves 
(except in No. 4); no palet: leaves roughened with very short 
stiff hairs often hooked at least on the margins and usually sub- 
appressed in opposite directions from the middle. ( Leersia Swartz.) 
* Spikelets narrowly oblong or lanceolate. 
1. H. oryzoides Mieg. (Rice cuT-Grass.) Culms6 to 10dm. high: sheaths hispid ; 
blades rather thick and rough: panicle 2 to 3 dm. long; branches rather weak and 
