HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 293 
about three-fourths as wide, the branches few, spreading or ascending; spikelets 3.5 
to 3.7 mm. long, 1.4 mm. wide, elliptic, prominently papillose-hispid; first glume 
nearly or quite half the length of the spikelet, narrow, acute; second glume shorter 
than the fruit and sterile lemma at maturity; fruit 3mm. long, 1.3 mm. wide, elliptic, 
subacute. 
Autumnal form erect or leaning, branching from all but the uppermost nodes before 
the maturity of the primary panicle, 
the branches slightly divaricate, the 
blades and panicles not greatly re- 
duced. 
DISTRIBUTION. 
Dry woods and prairie, Texas. 
Texas: Kimble County, Reverchon 
1620; Kerrville, Heller 1726, 
1736, 1766, Smith in 1897; Aus- 
tin, Hall 8344 in part; Coman- 
che Spring, Iindheimer 1265 Fi@. 330.—Distribution of P. pedicellatum. 
in Mo. Bot. Gard. distr; ‘‘in 
the Sabines bottom,’’ Lindheimer 158 (last two in Gray Herb.). 
Y/Y 177. Panicum nodatum sp. nov. 
DESCRIPTION. 
Vernal form in tufts from a knotted crown; culms ascending or spreading, slender 
but hard and wiry, 25 to 35 em. high, finely papillose, crisp-puberulent; sheaths 
shorter than the internodes, papillose-hispid between the strong nerves; ligules dense, 
scarcely 1 mm. long; blades firm, ascending, 3 to 5 cm. long, 3 to 6 mm. wide, broadest 
at the rounded base, abruptly acute, puberulent on both surfaces, papillose-ciliate 
with stiff hairs 2 to 3 mm. long; 
panicles 4 to 5 cm. long, half to 
two-thirds as wide, few-flowered, 
the few branches ascending; spike- 
lets 4 mm. long, 1.7 mm. wide, 
pyriform, papillose - pubescent; 
first glume about one-third the 
length of the spikelet, acuminate; 
second glume slightly shorter than 
the fruit and sterile lemma; fruit 3 
mm. long, 1.4 mm. wide, obovate- 
elliptic, minutely white-puberu- 
lent at the apex. 
Autumnal form widely genicu- 
late-decumbent, early branching 
from all but the uppermost node, 
the branches somewhat divaricate, equaling or exceeding the main culm, with 
numerous swollen nodes, the internodes 2 to 3 cm. long, the whole forming a loose 
tuft, the blades and panicles not reduced. 
Type U.S. National Herbarium no. 592749, collected August 7, 1904, Sarita, Texas, 
by A. S. Hitchcock (no. 3865). 
Fic. 331.—P, nodatum. From type specimen. 
@ This in the Gray Herbarium is numbered 835. 
v Vor. Cencdkeuesms Da oe an 
