No. 29. 
COTTEA PAPPOPHOROIDES Kunth. 
Plant perennial from a short, scaly rootstock, light green or often purplish in 
the infloresence and lower sheaths. 
Culms loosely tufted at base, erect or somewhat spreading, branching, hollow, 
terete, pubescent, 1 to 2 feet tall. 
eaves; radical and from radical shoots few and small; of culm 7 to 10, sheaths 
close, minutely cinerous pubescent, nearly equaling or usually exceeding the inter- 
nodes; blade flat or involute toward the tapering point, somewhat scabrous on 
both sides, 14 to 2 lines wide, 3 to 6 inches long; ligule a minute hairy fringe. 
Inflorescence a rather close, or becoming loose, lanceolate or narrowly pyra- 
midal panicle, 3 to 6 inches long, peduncle but little exserted, rachis pubescent, 
‘ nearly terete; branches mostly alternate, flower-bearing nearly to the base, slightly 
spreading, 1 to 2 inches long, bearing the spikelets on short pubescent pedicels. 
Spikelets obovate, flat, 7- to 10-flowered, 3 to 4 lines long; empty glumes oblong 
or oblong-ovate, nearly equal, 2 lines long; first glume iecdiade 3-toothed at 
apex, about 13-nerved, pubescent on back, margins hyaline; second glume acutish 
or short awned, about 9-nerved, with hyaline margins, less pubescent than first 
glume; floral glumes obovate, 1 to 14 lines long, pubescent especially at base, about 
15-nerved, cleft above into 11 narrow divisions, the outer more deeply cleft, and 
ciliate on the margins, with long white hairs, each terminating in a hispid awn }to 
14 lines long; palet lanceolate, with 2 pubescent nerves continuing and connivent 
about the cleft apex, narrow hyaline margins infolded, 14 lines long. 
Grain, dull whitish yellow, oblong, slightly curved, falling aan the disartic- 
ulated spikelet or easily escaping free. 
PLATE XXIX; a, spikelet; b, empty glumes; ¢, floral glumes; c', part of apex 
of floral glume enlarged; d, palet; d', apex of palet. The figure b does not show , 
the full number of nerves. 
Texas to Arizona and Mexico, 
