No. 17. 
SPOROBOLUS BUCKLEYI Vasey. 
Culms erect, loosely tufted, slender, not branching, compressed, especially 
below, smooth, 2 to 3 feet tall. 
Leaves; radical, few, sheaths green or purplish, compressed, tapering into 
slender, mostly folded, smooth, long pointed blades, 6 to 15 inches long, green at 
maturity; of culm 4 or 5; sheaths mostly exceeding internodes, lower ones com- 
pressed and open, upper close, blades like those of radical leaves; ligule a minute 
tawny fringe. 
_ | Inflorescence a loose, spreading, erect panicle, 10 to 15 inches long; branches 
spreading or becoming reflexed, mostly alternate, 3 to 5 inches long, slender, bear- 
ing beyond the lower third, short branches of pedicellate spikelets. : 
pikelets obovate, 1-flowered, 3 line long; first glume lanceolate, acute, thin, 
smooth, 1-nerved, 4 line long; second glume same, but nearly twice as large; floral 
glume ovate, acuminate, hyaline, smooth, 1-nerved, 3 line long; palet lance-ovate, 
acute, obscurely 2-keeled, 4 line long, in age splitting to the base. 
Grain elliptical-globose, utricle light-brown, 4 line long. 
PuatE XVII; a, spikelet enlarged. 
Well distinguished by the large panicle of capillary branches and many 
flowered, small spikelets. A handsome species. 
Texas to Mexico. 
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