HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 27 
long-exserted, very slender, 5 to 20 cm. long, the branches scattered, short, erect, the 
branchlets bearing 1 or 2 subsessile 
spikelets, the setiform prolongation 
of the axis mostly equaling or ex- 
ceeding the spikelet; spikelets 3.5 
to 3.8mm. long, 1.8 to 2mm. wide, 
elliptic, turgid, abruptly pointed; 
first glume about half the length 
of the spikelet, subacute, strongly 
5 to 7-nerved; second glume and 
sterile lemma scarcely equaling 
the fruit, strongly 5 to 7-nerved; 
fruit 3.1 to 3.3 mm. Jong, 1.8) to 
1.9 mm. wide, elliptic, minutely 
pointed, obscurely transversely ru- 
gose. 
This species differs from P. rami- 
setum in having longer, narrower 
blades, narrower at the base than 
the summit of the sheath, and larger spikelets, commonly but one to a branchlet, 
hence most of the spikelets subtended by a bristle. 
Fig. 7.—P. reverchoni. From type specimen. 
DISTRIBUTION. 
Rocky or sandy prairies and lime- 
stone hills, Texas. 
Texas: Dallas, Bebb 1321, Bush 
_ 674, Reverchon 1096, in Cur- 
tiss N. Amer. Pl. 3618*, L; 
Abilene, Tracy 7940; Colo- 
rado, Tracy 7939; Weather- 
ford, Tracy 7948; Kerrville, 
Heller 1603; Gillespie County, ee 
Jermy 39; Bexar County, Fic. 8.—Distribution of P. reverchoni. 
Jermy 233, 234; San Antonio, 
Jermy; southwest Texas, Nealley in 1890; without locality, Wright 792. 
Y 6. Panicum firmulum sp. nov. 
DESCRIPTION. 
Plants light olive green, rather loosely tufted, ascending or decumbent at base, 
from creeping knotted rootstocks as 
much as 5 cm. long; culms 30 to 
40 cm. high, simple or with a few 
appressed branches, glabrous, the 
nodes glabrous or strigose; sheaths 
overlapping, striate, papillose-pubes- 
cent, papillose only, or nearly gla- 
brous, a tuft of stiff hairs 3 mm. long 
on the sides at the summit; ligule 
dense, about 1.5 mm. long; blades 
ascending or spreading, firm,4 to 10 
cm. long, the lower shorter and more 
spreading, 4 to 7 mm. wide, ab~ — 
ruptlyacuminate,roundedatthebase — 
and wider than the sheath, sparsely 
papillose-ciliate, at least toward the 
base, aie on the upper surface; panicles slender , interrupted, their brancheserect, 
e a, aie ANCA AwWrvidstionn AAV IAAL Y_ 
Wy, cabs J 
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Fig. 9.—P. firmulum. From type specimen. 
