146 



ZlZANIEAE 



Zizania 



50 



Map 261 



Leersia oryzoides (L.) Sw. 



2. Leersia oryzoides (L.) Sw. (Homalocenchrus oryzoides (L.) Poll.) 

 Rice Cutgrass. Map 261. This species is found throughout the state 

 but on account of its habitat and light requirements it is infrequent. It 

 prefers full sunlight and is found in low, wet places, especially along 

 ditches, old river channels, outlets of springs, in springy places, and about 

 lakes. The species varies considerably. In late flowering forms, sometimes 

 the panicles do not expand and are included. Rarely forms with smooth 

 sheaths are found. 



Maine, Que. to e. Wash., southw to Fla., Tex., Colo., Ariz., and s. Calif. ; 

 also in Eu. 



3. Leersia lenticularis Michx. (Homalocenchrus lenticularis (Michx.) 

 Scribn.) Catchfly Grass. Map 262. This grass seems to be restricted 

 to the stream courses of the southwestern part of the state and the valley 

 of the Kankakee River. It is usually found in low ground in woods, on 

 the borders of ponds, about sloughs, and in ditches. It is infrequent but 

 where found often plentiful. 



Ind. to Minn., southw. to S. C, Fla., and Tex. 



9. ZIZAMEAE Hitchc. Indian Rice Tribe 



113-190. ZIZANIA L. Wildrice 



[Fassett. A study of the genus Zizania. Rhodora 26 : 153-160. 1924.] 



Pistillate lemmas thin and papery, dull, finely striate, scabrous over the whole surface; 



aborted spikelets slender and shriveled, less than 1 mm thick 1. Z. aquatica. 



Pistillate lemmas firm and tough, with a lustrous and coarsely corrugate surface, 

 scabrous on the margins, at the summit, along the awn, and sometimes along the 

 nerves, otherwise glabrous; aborted spikelets with a distinct body 1.5-2 mm thick. 

 Culms 60-120 cm high; blades generally less than 10 mm wide; lower pistillate 

 branches with 2-6 spikelets; lower or middle staminate branches with 5-15 spike- 

 lets la. Z. aquatica var. angustifolia. 



Culms mostly 125-275 cm high; blades generally 10-50 mm wide; lower pistillate 

 branches with 11-29 spikelets; lower or middle staminate branches with (20) 

 30-60 spikelets lb. Z. aquatica var. interior. 



