GRAMINE.E. (GRASS FAMILY.) 549 



4. L. hexandra, Swartz. Panicle contracted, erect, simple ; spikclets 

 lanceolate or oblong ; stamens 6. — In lakes and ponds, often in deep water, 

 Florida, and westward. July and Aug. — Culms slender, l°-6° long, mostly 

 branching. Leaves narrow, rather rigid. Panicle 2' - 3' long, exscrtcd. Spike- 

 lets short-fringed, 2'' long, loosely imbricated. 



2. ZIZANIA, Gronov. Wild Rice. 



Rank water grasses, with broad flat leaves, and large diffuse panicles of mo- 

 noecious 1-flowercd spikelets, on club-shaped jointed pedicels. Glumes none, or 

 reduced to a cup-siiaped ring at the base of the spikelet. Palea) 2, membrana- 

 ceous, the lower one rough-awned in the pistillate spikelet. Stamens G. Stig- 

 mas elongated, brush-shaped. Grain cylindrical, free. 



1. Z. aQUatica, L Lower portion of the panicle staminate and widely 

 spreading, the upper pistillate and erect, with straight branches ; awn straight, 

 elongated ; styles 2 ; grain linear. — Deep marshes and ponds, Florida, and 

 northward. July. — Culms 4° - 8° high. Leaves rough beneath. Panicle 1°- 

 2° long. 



2. Z. railiacea, Michx. Panicle diffuse ; staminate and pistillate spike- 

 lets intermixed ; awns short ; styles united, elongated ; leaves smooth, with 

 rough edges; grain oval. — With the preceding. April and May. — Culms 

 4°- &° high. Lea\i3s somewhat glaucous. 



3. HYDROCHLOA, Beauv. 



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

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

 in the sheaths of the upper leaves. Spikelets 3-4 in a spike, the upper one 

 Btamiiiate and exserted. Glumes none. Paleae 2, hyaline, the lower one emar- 

 ginate, the upper acute. Stamens 6. Styles 2 : stigmas elongated. Grain 

 ovoid, free. 



1. H. Carolinensis, Beauv. (Zizania fluitans, il//c/i.r.) — Floating in 

 still water or creeping on muddy banks, Florida to North Carolina. July and 

 Aug. — Culm filiform, branching, ^°-2° long. Leaves l'-2' long. 



4. ALOPECURUS, L. Foxtail Grass. 



Flat-leaved grasses, with the 1-flowered spikelets closely crowded in a simple 

 spike-like cylindrical panicle. Glumes 2, compressed, boat-shaped, sharply 

 keeled, united below, awnless. Lower palca compressed, awned on the back 

 below the middle, the upper wanting. Stamens 3. Styles 2, rarely united be- 

 low. Grain free, smooth and lenticular. 



1. A. geniculatus, L. Low; culms ascending, bent at tlie lower joints; 

 awn longer than the obtuse hairy glume. — Wet cultivated grounds, Florida and 

 northward. April. — Culms 6'- 12' high. Leaves 2'- 4' long, with the sheaths 

 shorter than the joints. Spikes 1' - 1|' long. 



