HITCHCOCK AND CHASE — NORTH AMERICAN PANICUM. 



DISTRIBUTION. 



In pine lands, hammocks, and sandy woods, South Carolina to southern Florida. 



South Carolina: Isle of Palms, Ball 791, Chase 4537, 4549, Hitchcock 421. 



Florida: Duval County, Curtiss 

 3600 A in part (Gray Herb.); 

 St. Augustine, Richer 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 926^; Crystal, 

 Combs 1023 ; Clarcona, Pieters 

 116; Orange County, Baker 69; 

 Eustis, Chase 4063, 4122, Nash 

 45 in part, 1120, 1674; Clear- 

 water, Tracy 7167; PalmaSola, Tracy 6713 in part; Sneeds Island, Tracy 6460, 

 7050, 7051 in part: Miami, Chase 3908, Hitchcock 574, 633, 653, 655; Ormond, 

 Hitchcock 575. 



Fig. 351.— Distribution of P. equilaterale. 



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 striae, 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 



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. 



Fig. 352.— P. albomaculatum. From 

 type specimen. 



