HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. 311 
DISTRIBUTION. 
In pine lands, hammocks, and sandy woods, South Carolina to southern Florida. 
Soutu Carourna: Isle of Palms, Ball 791, Chase 4537, 4549, Hitchcock 421. 
Fiortwwa: Duval County, Curtiss 
3600 A in part (Gray Herb.); 
St. Augustine, Ricker 943; Ce- 
dar Key, Combs 793; Apa- 
lachicola, Chapman; Pensa- 
cola, Tracy 8428; Grasmere, 
Combs 1053; Gainesville, Chase 
4241, 4258, Combs 737; Homos- 
sassa, Combs 9264; Crystal, 
Combs 1023; Clarcona, Pieters 
116; Orange County, Baker 69; 
Eustis, Chase 4063, 4122, Nash 
45 in part, 1120, 1674; Clear- 
Fig. 351.—Distribution of P. equilaterale. 
water, Tracy 7167; Palma Sola, Tracy 6713 in part; Sneeds Island, Tracy 6460, 
7050, 7051 in part: Miami, Chase 3908, Hitchcock 574, 633, 653, 655; Ormond, 
Mitchcock 575. 
188. Panicum albomaculatum Scribn. 
Panicum albomaculatum Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 19: 2. 1900. 
“Dry rocky hills, Patzcuaro, State of Michoacan [Mexico], October 10. C.G. Pringle, 
No. 5203, 1892.’ The type, in Hitchcock’s herbarium, consists of a tuft of primary 
culms with mature panicles, the culms beginning to branch from the lower nodes. 
DESCRIPTION. 
Vernal culms tufted, 50 to 100 cm. high, arising from a knotty crown, erect, slender 
but stiff, minutely puberulent between the striz, at least below the glabrous nodes; 
sheaths long, the lower overlapping, minutely puberulent, more or less mottled with 
white spots, densely short-ciliate on the margin; ligules about 0.2 mm. long; blades 
Fig, 352.—P. albomaculatum. From 
type specimen. 
firm, spreading or ascending, reflexed when old, 
8 to 17 cm. long, 9 to 15 mm. wide, linear- 
lanceolate, acuminate, rounded and ciliate at 
the base, roughish on the upper surface and 
with a narrow line of appressed pubescence 
along the very scabrous margins, glabrous or 
obscurely pubescent beneath; panicles long- 
exserted, ovate in outline, 10 to 16 cm. long, 
two-thirds to three-fourths as wide, loosely flow- 
ered, the axis and ascending branches glabrous; 
spikelets 2.8 mm. long, 1.2 mm. wide, obovate 
elliptic, obtuse, sparsely pubescent; first glume 
nearly or quite half the length of the spikelet, obtuse, or subacute; second glume 
and sterile lemma equaling the fruit at maturity, fruit 2.2 mm. long, 1.2 mm. wide, 
elliptic, subacute. 
Autumnal form not known. 
Probably most nearly related to P. equilaterale Scribn. 
