No. 33. 

 TRIODIA ALBESCENS (Mnnro.). {Trimspis alhfsrms Munro in Herb.) 



J^laiit peVeniiial, witli sliglitly thickeufd htise. smootli and often glaucous 

 throughout. 



Rddts coarse. 



Culms loosely tufterl, erect, solid, terete, not branching, 15 to 30 inches tall. 



Leaves; radical, sheaths short and open; blades flat or folded, involute, slen- 

 der-pointed, 3 to 3 lines wide, 5 to 13 inches long: of i-ulni 2 to 4, sheaths shorter 

 than internodes, open above; bla<les like those of radical leaves; ligule a dense line 

 of short, fine hairs. 



Inflorescence a slender, contracted, close panicle, somewhat interrupted below, 

 erect or slightly nodding, i inch wide, 4 to 8 inches long; branches appressed. un- 

 equal, i to l\ inches long, bearing along their entire length rather crowded short- 

 pedicelled spikelets. 



Spikelets oval, compi'essed, 8- to 12-flowered, 'Z\ to 3 lines long and | as wide; 

 first and second glumes nearly equal, second, slightly larger, broadly ovate, 

 acute, carinate, hyaline, smooth, 1-nerved, H lines long; internodes of i*achis 

 curved, i line long or less; floral glume broadly-elliptical, 3-nerved, emarginate or 

 nearly entire, hyaline, smooth, or nearly so, midnerve slightly if at all excurrent, 

 lateral nerves not marginal; palet broadlj- ovate, obtuse, 2-keeled with the mar- 

 gins folded flat, 1^ lines long. 



G-rain elliptical, yellow, i line long. 



Plate XXXIII; a, spikelets; h, empty glumes; c, floral glumes; d, palet. 

 Texas and New Mexico. 



