Zizania 



Paniceae 



147 



Map 264 

 Digitaria fihformi's (L.) KoeL 



Map 265 

 Digitaria Ischaemum (Schreb.) Muhl. 



1. Zizania aquatica L. (Zizania palnstris of recent authors, not L.) 

 Annual Wildrice. Map 263. Infrequent to local in the lake area in 

 dredged ditches, sloughs, and swamps. 



This grass affords protection and food for water birds, especially wild 

 ducks, and it is now often planted for these purposes. 



The following are popular publications on this subject: Wild rice; 

 its uses and propagation, by Brown and Scofield. U. S. Dept. Agric. Bur. 

 PI. Ind. Bull. 50: 1-23. 7 pi. 1903; Wild rice, by Fyles. Dept. Agric. 

 Dominion of Canada, Bull. 42, n.s. 1-20. 1920; Propagation of wild-duck 

 foods, by McAtee. U. S. Dept. Agric. Bull. 465. 1917. 



Que. to N. Dak. and Idaho, southw. to Fla., and La. 



la. Zizania aquatica var. angustifolia Hitchc. (Zizania palustris L.) 

 Northern Wildrice. This variety has the habitat of the species. 

 N. B., Que., and N. Dak., southw. to N. Y. and Nebr. 



lb. Zizania aquatica var. interior Fassett. This is a form of the species 

 which Fassett recognizes but Hitchcock does not. It seems to be distinct 

 in our area. Its habitat is that of the species. 



10. PANICEAE R. Br. Millet Tribe 



Spikelets enclosed in globose spiny burs 137. Cenchrus, p. 177. 



Spikelets not as above. 



Spikelets subtended by 1-several scabrous bristles; inflorescence a spikelike panicle. 



135. Setaria, p. 176. 



Spikelets not subtended by bristles. 



Spikelets awned or with an acuminate and spiny-hispid second glume and sterile 



lemma 133. Echinochloa, p. 174. 



Spikelets not awned nor spiny-hispid. 



Spikelets in slender one-sided racemes, subsessile and in two rows; first glume 

 obsolete. 

 Spikelets obovate to suborbicular or, if narrowly elliptic, the rachis broadly 



winged 128. Paspalum, p. 149. 



Spikelets lanceolate or elliptic, on a narrow rachis. .. .121. Digitaria, p. 148. 



