GRAMINE^E. (GRASS FAMILY.) 549 



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

 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, exserted. 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 -flowered spikelets, on club-shaped jointed pedicels. Glumes none, or 

 reduced to a cup-shaped ring at the base of the spikelet Paleas 2, membrana- 

 ceous, the lower one rough-awned in the pistillate spikelet Stamens 6. Stig- 

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



1. Z. aquatic a, 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. miliacea, 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 - 6 high. Leaves 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 

 staminate 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, Michx.) Floating in 

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

 Aug. Culm filiform, branching, - 2 long. Leaves 1 ; - 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 the 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 !'-!' long. 



