ANDROPOGONE^. 



23 



lax, very smooth ; ligule very short ; bhxdes erect, flat, some of the 

 lower 40 cm. long, 1 cm. wide, tlie upper 1-4 cm. long. Panicle 

 dense, 30-30 cm. long, 2-3 cm. diam., more or less interrupted 

 below, clothed with yellowish-white wool, the anthers and the stig- 

 mas protruding. Spikelets in pairs, bearing at the base a tuft of 

 silky hairs 1 cm. long, and scattered hairs on the back of the outer 

 glumes; first glume 4 mm. long, oblong, obtuse, ciliate at tlie apex, 

 5-nerved, second a little shorter, otherwise like the first, tliird 

 empty, smooth, still shorter, fourth and the palea 1.5 mm. long. 



Fig. 5. — ImperaUi Hookeri. Spikelet, X 9. (Richardson.) 

 Stamen 1. Styles united below, 6 mm. long including the ovary. 

 N. Mex., WrigJit 2001; Texas, Havarcl 24; Southern Calif., Parish 

 1031 ; Mexico (Jalisco), Palmer 444. 



Arizona, Nevada, West Texas. 



6. (74). MiscANTHTJS Anderss. (Efvers. Vet. Akad. Stockh. ir35 

 (1885). EulaliaTrm. Mem. Acad. St. Petersb. (vi.) 2 : 332 (1833) 

 in part. EccoiUrpus Steud. Syn. PI. Gram. 123 (1855). 



Spikelets in pairs unequally pedicellate on the inarticuhite 

 branches of the spreading panicle. First and second glumes mem- 



