HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM. 521 
97. Panicum villosissimum Nash. 
Panicum villosissimum Nash, Bull. 
Torrey Club 33: 149. 1896; Contr. 
U. & Nat. Herb. 15: 233. 1910. 
DISTRIBUTION. 
‘Dry open woods, eastern United 
States; alsoin Guatemala. The type 
specimen from Georgia. 
GUATEMALA: Guatemala City, 
Fig. 123.—Disiribution of P. villosissimum. Hitchcock 9106. 
98. Panicum pseudopubescens Nash. 
Panicum pseudopubescens Nash, Bull. 
Torrey Club 26: 577. 1899; Contr. U. 8. 
Nat. Herb. 15: 235. 1910. 
DISTRIBUTION. 
Sandy open woods eastern United States; 
also in San Luis Potosi. The type speci- 
men from Alabama. 
San Luis Porosf: Without locality, 
Schaffner 146. Fig. 124.—Distribution of P. pseudopubescens. 
SPHAEROCARPA. 
Culmsspreading; panicle nearly as broad as long; spikelets 1.6 
RPA RVRTNT  MOMBA CI st a Ch ete AN Ue se Sha ta 99. P. sphaerocar pon. 
Culms erect or ascending; panicle never more than two-thirds 
as broad as long; spikelets 1 to 1.2 mm. long...._...... 100. P. erectifolium. 
99. Panicum sphaerocarpon Ell. 
Panicum sphaerocarpon Ell. Bot. 8. C. & Ga. 1: 125. 1816; Contr. U. S. Nat. Herb. 
15: 251. 1910. ss 
DISTRIBUTION. 
Sandy soil and gravelly banks, eastern United States through Mexico to northern 
South America. The type specimen from Georgia. 
San Luts Porosi: Without locality, Schaf/ner 147. 
Micuoacdn: Sierra de San Andrés, Ross 381. 
Pursta: Chinantla, Liebmann 327. Teziutlin, Orcutt 3952. 
Veracruz: Orizaba, Amer. Gr. 
Nat. Herb. 155, Botteri. Ja- 
lapa, Pringle7883, 8344, Hitch- 
cock 6607, 6633. 
British Honpuras: Manatee La- 
goon, Peck 61 (Gray Herb.). 
GUATEMALA: Guatemala City, 
Hitchcock 9105. Coban, Tiirck- 
heim 56, 3829. Volcano Pa- 
caya, Kellerman 6236. 
Costa Rica: Copey, Tonduz11866, 
- San Pedro de la Calabaza, Tonduz 10745. Pdramos del Abejonal, Tonduz 7878. 
Panama: El Boquete, Hitchcock 8172. Dolega, Hitchcock 8343. 
VENEZUELA: Without locality, Fendler 1638. 
Fria. 125.—Distribution of P. sphaerocarpon. 
