MONOCOTYLEDONOUS OR ENDOGENOUS PLANTS. 595 



prostrate at the base ; leaves spreading ; base of the pani- 

 cle mostly inclosed in the sheath of the subtending leaf; 

 sjjikelets strongly fringed, about 3" long. 



L. ViRGiNiCA, Willd. Panicle nearly simple, the lower 

 branches spreading; spikelets small, concave, sparingly 

 fringed, closely imbricated; stamens 1-2. (L. imbricata. 

 Lam. ?) Swamps and margins of streams. July and 

 August. More slender than the last, and with spikelets 

 half as large. 



ZIZANIA, Gron. Wild Kice. 



Rank luater-grasses, wdth broad flat leaves, and large 

 diffuse^M^n'c/e.'? of monoecious 1-flowered spikelets, on club- 

 shaped jointed pedicels ; glumes none, or reduced to a 

 cup-shaped ring at the base of the spikelet ; palece 2, mem- 

 branaceous, the lower one rough-awned in the pistillate 

 spikelet; stamens 6; stigmas elongated, brush-shaped; 

 grain cylindrical, free. 



Z. AQUATiCA, L. Lower portion of the pa7iicle staminate 

 and widely spreading, the upper pistillate and erect, with 

 straight branches; aivii straight, elongated; styles 2; 

 grain linear. Deep marshes and ponds. July. Culms 

 4°-8° high ; leaves rough beneath ; panicle l°-2° long. 



ALOPECUEUS, 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; lo2uer palecB compressed, awned on the back 

 below the middle, the upper loanting; stamens 3 ; styles 

 2, rarely united below ; grain free, smooth and lenticular. 



A. GENicuLATUS, L. Low ; culms ascending, bent at 

 the lower joints; aivn longer than the obtuse hairy glume. 

 Wet cultivated grounds. April. Culms 6-12' high ; 



