HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 103 
DESCRIPTION. 
Plants like P. agrostoides in habit, culms on the average rather taller, sometimes 
geniculate at base; sheaths appressed-pubescent along the sides toward the summit 
or glabrous; blades often sparsely pilose on the upper surface at the conduplicate 
base; panicles terminal and axillary, 10 
to 25 cm. long, rarely over 5 cm. wide, 
the long, solitary or fascicled branches 
erect, naked at the base, with ap- 
pressed branchlets bearing crowded 
spikelets on short, scabrous, but not 
pilose pedicels, or these occasionally 
with one or two erect hairs; spikelets 
2.2 to 2.5 mm. long, about 0.8 mm. 
wide, turgid; first glume slightly more 
than half the length of ‘the spikelet, 
acuminate; second glume slightly Fig. 95.—Distribution of P. condensum. 
longer than the sterile lemma, both 
acuminate, the tips slightly spreading, scabrous on the midnerves toward the apex; 
fruit 1.4 to 1.5 mm. long, about 0.7 mm. wide. 
This species is closely related to P. agrostoides, from which it is distinguished by 
the condensed panicle of slightly larger spikelets. In occasional specimens, as Combs 
9644, 973, Hitchcock 174, and Meislahn 159, the panicle branches are ascending, the 
panicle not contracted, thus approaching P. agrostoides. 
DISTRIBUTION. 
Borders of streams and ponds and in wet places, Pennsylvania to Florida and west 
to Texas, mostly near the coast; also in the West Indies. 
New Jersgey: Cape May County, Van Pelt in 1909 (Acad. Phil. Herb.). 
PENNSYLVANIA: Chambersburg, Porter in 1897. aN & 
DELAWARE: Smyrna, Long in 1908 (Acad. Phil. Herb.). NS ee Soars 
District or CoLumBiA: Steele in 1896. Soe WW cle) 
VireiniA: Brick Haven, Steele in 1896; Four-Mile Run, Chase 2673; Virginia 
Beach, Hitchcock 174. 
NortH Carona: Wilmington, Hitchcock 444. 
SoutH Carona: Isle of Palms, Chase 4527. 
Fioripa: Jacksonville, Curtiss 5298, 5576, 5576A; Titusville, Chase 4014; Orange 
County, Baker 18, Combs 1144; Clarcona, Meislahn 159; Homosassa, Combs 
957, 9644, 973; Crystal, Combs 1011; Jensen, Hitchcock 747; Miami, Hitchcock 
172, 695, 699; Braidentown, Simpson 7093; St. Vincents Island, Chapman, 
Tracy 6444. 
Mississippi: Horn Island, Tracy in 1893 (Hitchcock Herb.). 
Texas: Dallas County, Reverchon 2368; Waller County, Thurow in 1898; without 
locality, Lindheimer 728. 
Banamas: Nassau, Curtiss W. Ind. Pl. 174. 
Cusa: Without locality, Wright 3862 in part. 
GRAND Cayman: Hitchcock in 1891 (Mo. Bot. Gard. Herb.). 
LEEWARD Istanpbs: Guadeloupe, Duss 3919. 
