92 



MISSOURI BOTANICAL GARDEN. 



nearly as long as the body ; sepals 3 ; blades spatulate or 

 fiddle-shaped, tapering at the base, nearly sessile, obtuse 

 and rounded at the apex, the lower half semi-translucent, 

 the upper half thick and granular-incrusted, awnless, or 

 with a short, slightly downwardly-barbed awn from the 

 apex; perianth-bristles longer than the achene and sepals, 

 nearly or quite smooth; achenes oblong, triquetous, taper- 



ing at the base, light yellow at maturity, 



by 



antrorsely-hispid style, which is as long as the achene. 



S 



Sp 



i. Summer and autumn. 



The only specimen seen is that 



one. an JSleoch 



the 



of the type, collected in the Valley of the Eio Grande, 

 below Dona Ana, Donna Ana County, New Mexico, by 

 Mexican Boundary Survey 1523, 1848, in part, the other 

 two plants on this sheet being, 



other F. simplex (N). 



It has been referred to F. simplex macrostachya (Britton) 

 Coville, but differs conspicuously in the cylindrical spike- 

 lets, slender sterns, small leaves, and especially in the shape 

 of the sepals and position of the awn. 



4. FUIRENA SQUARROSA Michx. 



Fuirena squarrosa Michx. Fl. Bor. Am. 1 : 37. (1803). 



Fuirena squarrosa pumila Torr. Fl. U. S. 1 : 68. (1824;. * , 



Eootstocks scarcely any, rarely tuber-bearing, more com- 

 monly with fibrous roots, the plants being annual ; stems 

 tufted, glabrous, sometimes slightly ciliate on the margins^ ; 

 sheaths pubescent, the lower sometimes densely so ; spike- 

 lets sessile, solitary, or 2 to 8 together in the capitate clus- 

 ters, ovoid or ovoid-oblong, 6 to 12 mm. long, 3 to 5 mm. 

 in diameter; scales ovate or oblong, brown, pubescent, 

 mostly obtuse and rounded at the apex, 3-nerved, each 

 tipped with a short, spreading or recurved awn nearly as 

 long as the body; sepals 3: blades oblong, long-stalked, 

 semi-translucent, usually narrowed at both ends, acuminate 



L 



