HITCHCOCK AND CHASE—-NORTH AMERICAN PANICUM. 127 
V1. Panicum verrucosum Muhl. 
Panicum debile Ell. Bot. 8S. C. & Ga. 1: 129. 1816, not Desf. 1798. Nospecimen nor 
locality is cited. The type was not found in the Elliott Herbarium but the descrip- 
tion clearly identifies the species. 
Panicum verrucosum Muhl. Descr. Gram. 113.1817. ‘‘Habitat in N. Caesarea, Dela- 
ware, et Georgia.’’ The typeisin the Muhlenberg Herbarium. On the sheet is written 
‘“verrucosum” but there is nothing to indicate from which of the three States cited 
the specimen came. 
Panicum umbraculum Bosc; Spreng. Syst. Veg. 1: 314. 1825. This and the follow- 
ing are names found in the Willdenow Herbarium, on specimens collected by Bosc, 
and published as synonyms of P. verrucosum Muhl. Both belong to this species. 
Panicum rugosum Bosc; Spreng. loc. cit. 
DESCRIPTION. 
Plants bright green, solitary or few together, lax, at first erect but soon decumbent 
at base, and ascending or widely spreading; culms slender, 20 cm. to 1.5 meters high; 
sheaths shorter than the internodes, ciliate; blades 
thin, lax, flat, 5 to 20 cm. long, 4 to 10 mm. wide, 
somewhat narrowed toward the base, gradually nar- 
rowed to the acuminate apex, glabrous; panicles 
finally exserted, 5 to 30 cm. long, about as wide, 
diffuse, small panicles often produced at the lower 
nodes, at least the ultimate branchlets scabrous, the 
branches mostly solitary, the branchlets bearing a 
F1¢.121.—P. verrucosum. From type !¢W short-pediceled spikelets, mostly in twos, toward 
specimen. the ends; spikelets 1.8 to 2.1 mm. long, about 1 mm. 
wide, elliptic-obovate, subacute; first glume one- 
fourth the length of the spikelet or less; second glume and sterile lemma warty, 
elabrous, the glume shorter than the fruit at maturity; fruit 1.8 to 2 mm. long, 1 mm. 
wide, elliptic, acute. 
DISTRIBUTION. 
Wet, mostly shady soil, Atlantic Coastal Plain, Massachusetts to Florida and Texas; 
also in Indiana and Tennessee. 
MASSACHUSETTS: Springfield, Andrews 23; Plymouth, Oakes. 
New Yors: Staten Island, Tyler 
in 1898. 
New Jersey: Atsion, Chase 3546; 
Egg Harbor, Scribner in 1886, 
Vasey in 1884; Englishtown, 
Pearce in 1884. 
PENNSYLVANIA: Tinicum, Diffen- 
baugh in 1868, Smith 99. 
Inpiana: Dune Park, Chase 918, 
Mill 177 in 1898. 
DELAWARE: Ellendale, Commons 
Dole Fig. 122.—Distribution of P. verrucosum. 
Marytanp: Eastern Shore, Canby. 
District or CoLumBia: Chase 5440, Dewey 408, Kearney in 1895; Steele in 
1896, Ward in 1878 and 1879. 
Virerinita: Parksley, Warburton in 1903; Munden, Mackenzie 1671; Portsmouth, 
Noyes 84; Virginia Beach, Britton in 1895, Hitchcock 164, Kearney 2053; 
Suffolk, Boettcher 471; Dismal Swamp, Chase 3660. 
