174 



Paniceae 



Echinochloa 



50 



Map 324 



Echinochloa crusgalli (L) Beat 



0^ 50 



Map 325 



Echinochloa Walteri (Pursh) Heller 



47. Panicum latifolium L. Map 321. Rather frequent in dry or moist 

 white oak and black oak woods in the lake area. Infrequent to local in the 

 southern part of the state where it is largely replaced by the next species 

 which is absent in our northern counties. 



Maine, Que. to Minn., southw. to N. C. and Kans. 



48. Panicum Boscii Poir. Map 322. An infrequent species in the south- 

 ern half of the state, where it is found in dry woodland, associated with 

 black and white oak and white oak and hickory. 



Mass. to Wis., and Okla., southw. to Fla. and Tex. 



48a. Panicum Boscii var. molle (Vasey) Hitchc. & Chase. Map 323. This 

 variety has the range and habitat of the species in Indiana. It is doubtful 

 whether it should be maintained as a variety since I have found culms 

 from the same rootstock which would qualify for the species and the 

 variety. The general range of the variety is nearly the same as that of 

 the species. 



133-166B. ECHINOCHLOA Beauv. 



[Hitchcock. The North American species of Echinochloa. Contr. U. S. 

 Nation. Herb. 22: 133-153. 1920. Wiegand. The genus Echinochloa in 

 North America. Rhodora 23: 49-65. 1921. Farwell. Notes on the Michi- 

 gan flora, II. Michigan Acad. Sci. Rept. 21: 349-350. 1920.] 



Sheaths glabrous (rarely the lower ones somewhat pubescent or papillose-hispid) ; 



second glume pointed, not awned; fruit ovate-elliptic, usually 1.5-2 mm wide 



1. E. crusgalli. 



Sheaths (at least the lower ones) papillose-hispid (rarely glabrous) ; second glume 



with an awn usually 2-10 mm long (rarely shorter) ; fruit elliptic, generally less 



than 1.5 mm wide 2. E. Walteri. 



1. Echinochloa crusgalli (L.) Beauv. Barnyard Grass. Map 324. Fre- 

 quent to common in all parts of the state. "The common name of this grass 

 suggests that it might be a grass restricted to the vicinity of habitations, 



