No. 43. 
DIPLACHNE REVERCHONI Vasey. 
Plant a low tufted annual. 
Culms erect, slender, not branched, 3 to 10 inches long. 
Leaves at base, numerous, involute, setose, smooth, 1 to 24 inches long; of 
culms 1 or 2 above base, mostly exceeded by radical leaves ; sheaths striate, close, 
smooth; blade filiform, involute; ligule a minute, hairy fringe. 
Inflorescence a spike-like panicle, 14 to 3 inches long; the nearly sessile, ap- 
pressed spikelets alternate along the striate slender rachis. os 
Spikelets lance-linear, 6- to 10-flowered, 3 to 4 lines long; internode of rachilla 
glabrous; first glume ovate, acute, carinate, membranaceous, 1-nerved, smooth, 1 
line long; second glume oblong, obtuse or obscurely toothed } line longer; floral 
glumes 1} lines long, ovate-lanceolate, membranaceous, 2 teeth at apex, 2 lateral 
nerves slightly pubescent at base, vanishing before reaching the margin, mid-nerve 
excurrent into a minute hispid awn } line long; palet linear-lanceolate, 2-keeled, 
cleft at apex, minutely ciliate, ? line long. 
Grain light amber color, narrowly conical, falling with flower but easily sepa- 
rated. 
PuaTE XLITII; a, spikelet; b, empty glumes; c, floral glumes, dorsal and side 
views; d, palet. : 
Texas to Mexico. First collected by J. Reverchon, Texas. It has been re 
ferred to D, simplex Doell, from which I think it differs. 
