No. 1. 



IMPERATA HOOKERl Uiipr. in Aiidcisoii I'loc Stockliulm Ac;i(i. isr,:,, Kio. 



Plant ])ei'('uiiijil, rutlicr coai'se; few ciiliiis in ;i stool, on slioitjoiiitcil lootstocks jj 

 uich in diameter. 



Culms erect, simple, smooth, terete, 2 to '5 feet liij;li. 



Leaves from the base numerous with rather scarioiis, smooth sheatlis and tlaj) 

 blades 6 to 12 inches long. Leaves of culm 4; sheaths smooth, close, longer than tlie 

 inteniodcs; blades Hat, slijihtly scabrid on the niar,i;iiis and lower surface, slender- 

 pointed, ;5 to •") inches long, or the upper short and appressed; ligide membranaceous, 

 truncate, ] line long, ciliate with longer hairs at the sides. 



lujiorrsriicc an erect, white-hairy, spike-like j)anicle fi to 1(5 inches long and 1 inch 

 in diameter; branches mostly in threes or fours, ascending or appressed, many-tiowered 

 throughout. 



Spihiits 1 -flowered, nearly sessile, narrowly lanceolate, 1 i lines long ; empty glumes 

 covered with tine white hairs4to(ilineslo^g; first glume lance-ovate, obtuse, membrana- 

 ceous on margins and above, indistinctly 5 to 7-uerved, IJ lines long; second glume like 

 the first bnt ^ line shorter; floral glume ovate, acute, membranaceons, smooth, 1-nerved, 

 14 lines long; palet oblong, irregularly dentate, ij line long; grain obovate, trans- 

 lucent amber-color, ^ line long, falling with spikelet entire; style slender with two 

 prominent, brown, feathered stigmas, long-exserted, making the woolly panicle a]) 

 pear s])ecked with brown. 



Plate I; a, empty glumes enlarged aliout 12 times; h, floral glume; c, \r,\let; <l, 

 grain with style and stigmas. 



Southern California, Arizona and western Texas. I'robably a useful agricultural 

 grass for hot, arid districts. 



