6 
^ BouTELouA Havardi, Vasey, m ///.—'' (Section Atheropogon), 
Culms 10-15 in, high; lower leaves numerous, flat, rigid, 3-6 in. 
long, 1-2 lines wide, more or less pubescent on the margins below 
and on the sheaths, upper leaves short (1-2 in.); ligule a ciliate line; 
panicle 2-3 in. long, erect, composed of 5 or 6 approximate short 
spikes of about 10, crowded, erect i-flowered spikelets ; outer 
glumes lanceolate, the lower nearly as long as the flower, the upper, 
half as long; flowering-glume 2.5 lines long, broad-oval, 3-lobed, the 
lobes extending nearly half way down, the lateral ones becoming 
somewhat recurved; palet as long as its glume, narrow, with two 
stout recurved teeth at the apex; sterile flower longer than the perfect 
one, the pedicel i line long, the three awns each 4 lines, the middle 
onp membraneous-margined nearly to the apex. The crowded rha- 
chis and outer glumes, as also the back of the flowering-glume and 
palet, clothed with long villous hairs. 
*' Discovered in the Limpia Mrs. of Western Texas by Dr. V. 
Havard, U, S. A., for whom it is named." (Geo. Vasey.) 
BouTELOUA PUSILLA, Vasey, ined.— Perennial(?), 2 to 3 inches 
high ; leaves smooUi, very narrow and involute, the upper an inch 
long; spikes solitary, pectinately io-15-flowered, about .5 inch in 
length; rhachis smooth; spikelets (including setie) about 2 lines long, 
outer glumes smooth, the upper broadly lanceolate, 1.5 line long; 
twice the length of the unequally i-nerved lower one; flowering- 
glume very hairy at the base and on the lateral and middle nerves 
below, the long middle lobe 2-cleft, the stout central seta a line long, 
exceeding the two lateral ones; palet very broad, and longer than its 
glume; pedicel of sterile floret .5 line long, with a tuft of hairs at the 
top, and bearing two or three rudimentary, hooded glumes or sc.ales 
and three equal awns exceeding a line in length. 
New Mexico; G, R. Vasey, i88r. 
TkisETUM Halui, /a i^.— Culms slender, 6-18 in. high, smooth; 
y^ leaves flat, a line or less wide; minutely scabrous, involute near the 
tip; panicle contracted, 2-4 in. long, the erect and densely flowered 
branches an inch or less long; spikelet about 2.5 lines long, 2-3-flow- 
ered, the nearly smooth rhachis prolonged above the upper floret, 
and often bearing a slender hair-like awn; outer glumes about 1.5 
line long, equal m length, obtuse, the lower narrowly oblong, 3-nerved, 
the upper much broader and 5-nerved, nerves prominent, aculeate- 
scabrous, the lateral ones terminating below the scarious margin, 
which IS finely ciliate on the edge; the first flowering-glume 1.5-^ 
lines long, tuberculate-roughened on the back and scabrous near the 
tip, terminating in two acute teeth and bearing a scabrous, straight 
awn a line long, teeth of the second and third florets prolonged into 
slender setre less than a line in length, awn longer, twisted below 
and bent near the middle; paica about two-thirds as long as its 
glume; grain smooth, about i line long. 
Named for the late Elihu Hall, in whose Texan collection (1872) 
it was distributed under No. 799, mixed with Trisetum elongdtum, 
Kth. (7: inkrniplum^ Buckley; No. 3,546* of Curtiss^s Distribution 
of 1883) to which it is closely allied and which it much resembles in 
habit, but from which it differ^ essentially in its broader and obtU;>c 
