No. 4. 
PANICUM LACHNANTHUM Torrey. 
Roots slender. 
Culms closely tufted, with numerous short sterile branches from near the base, 
erect or ascending, | to 24 feet high, slender, glabrous. 
Leaves with flat blades 1 to 2 lines wide; sheaths from smooth to divaricately 
villous, those of the lower part of the stem long and far exceeding the short inter- 
nodes, those (sheaths) of the rootstock densely soft villous; ligule about 14 lines 
long, broadly obtuse, apical margin fimbriate; blade from gisbeous to minutely 
pubescent, commonly 2 to 4 inches long. 
Inflorescence a panicle on a long slender peduncle. Panicle contracted, 4 to 9 
inches long, composed of 7 to 9 erect or appressed sessile branches 1 inch or more 
long; spikelets closely racemose on the branches; pedicel flat; branches of the pant 
cle triangular, both with green scabrous angles. 
an inclination toward an arrangement in 2 rows along the racem 
Glumes 4; 3 lower membranaceous, empty; first a minute, teats, obtuse scale 
from 4 line long to nearly obsolete; second narrowly lanceolate, acuminate, 3- to 
5-nerved, densely long-villous on the back, hairs when the grain is mature, spread: 
ing in all directions as if from a point in the center of the spikelet; third similar 
to the last but broader and about 5-nerved, its middle portion glabrous, intra- 
marginal hairs as in the second glume and similarly spreading; fourth (flowering) 
glabrous, thin, coriaceous, with thin membranaceous margins, indistinctly 3-nerved, 
minutely roughened in longitudinal lines, lanceolate, acuminate, when mature 
chestnut-brown. 
Flower single, hermaphrodite. Palet similar in texture, shape, and color to the 
flowering glume, nerveless. Stamens 3; anthers + line long, one-half as broad. 
Stigmas long, cylindrical. 
Grain inclosed by the palet and its glume, oval, obcompressed, white, slightly 
exceeding $ line long. 
PuaTE IV; a, spikelet opened to show its parts, on the left the second glume 
and flowering glume, on the right the third glume and palet. The first glume, 
which should stand on the right, is omitted; the inflexed membranaceous margins 
of the flowering glume and palet are not shown; and the ovary is represented as 
of the size of a mature grain with the anthers twice their real length. 
This grass grows freely on stony hills, and probably is capable of renisting i 
drought. It seems deserving of trial as an agricultural grass for the southwest, 
Spikelets narrowly to broadly lanceolate-acuminate, 14 to 2 _— long, showing - 
