DESCRIPTIONS OF TRIBES AND GENERA. 



75 



a weed in gardens, but is cultivated in Bohemia upon 

 sandy soils, where the fruit is used for mush and por- 

 ridge ; in the Southern United States, where it is known 

 as Crab-grass, it is valued for fodder. 



Sec. II. Trichachne (Nees as a genus, Adcarpa Raddi, 

 UrocMoa Kunth, Alloteropsis Presl, Holosetum Steud., 



FIG. 26. Panicum sanguinale L. A t , 

 Part of a spike enlarged. A % 

 nat. size. (After Nees, Gen. Germ. 

 I. 18.) 



FIG. 27. Panicum spectabile 

 Nees. A nat. size. (Af- 

 ter Mart, and Eichler, Fl. 

 bras. II. II. pi. 22.) 



CoridocJdoa Nees, Bluffia Nees). Racemes or panicles 

 simple, usually with long silky hairs. 



Sec. III. Tlirasya (Kunth as a genus, Tylothrasya 

 Doll.). Spikes with a broad axis, solitary. Flowering 

 glume of the $ flower frequently two-cleft. 



Sec. IV. Echinolcena (Desv. as a genus). Spikes single, 

 divergent (Genus No. 17 of B. & H., Gen. PI. III. p. 1107). 



Sec. V. Braclriaria. Inflorescence as in Paspcdum, 

 glumes awnless. 



