HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 135 
volume 2 contains but 522 pages in all the copies we have seen. The type is undoubt- 
edly the Hoffmansegg specimen mentioned above. 
Panicum oplismenoides Nash, Bull. Torrey Club 30: 381. 1908, not Hack. 1888. 
‘Collected on the edge of a ditch at Vega Baja, May 9, 1899, by Heller, no. 1316.” 
The type is in the herbarium of the New York Botanical Garden. 
DESCRIPTION. 
Plants perennial, cespitose, decumbent or creeping, rooting at the lower nodes, 
glaucous and glabrous throughout, except as noted; culms slender, branching, 20 to 
80 cm. long, leafy, with numerous short internodes, the nodes sometimes sparsely 
pilose; sheaths rarely over 1 cm. long, ciliate, and some- 
times, especially on young shoots, sparsely pilose; ligules 
nearly obsolete; blades 1 to 3 cm. long, 2 to 6 mm. wide, 
oblong-lanceolate, rounded or subcordate at base, spreading 
or reflexed, or the upper and often those of young shoots 
appressed, sometimes sparsely pilose at the base; panicles 
Fic. 130.—P. parvifolium. Sshort-exserted, 2 to 4 cm., rarely 6 cm. long, about as wide, 
From type specimen. loosely flowered, the slender, flexuous branches spreading, 
the branchlets and pedicels divergent; spikelets about 1.5 
mm, long, 0.8 mm. wide, turgid, blunt, glabrous; first glume slightly more than half 
the length of the spikelet, subacute, 3-nerved; second glume and sterile lemma sub- 
equal, 5-nerved, the sterile palea nearly as long as its lemma; fruit 1.4 mm. long, 
0.8 mm. wide, ovate, smooth and shining. 
DISTRIBUTION. 
Damp shady places, Costa Rica and the West Indies, south to Brazil and Paraguay. 
Costa Rica: Buenos Aires, Pittier 10594, Tonduz 3631. 
Cusa: Los Almacigos, Wright 3458; Herradura, Baker 2078, Hitcheock 181, Tracy 
9060, 9079. 
Porto Rico: Sintenis 5719, 1216 (Krug & Urban Herb.); Vega Baja, Heller & 
Ffeller 1316. 
TriIntpab: Broadway 2372. 
Britis Guiana: Schomburgk 407. 
Dutcu Gutana: Surinam, no collector given (Gray Herb.). 
Frencu Guiana: No data (Gray Herb.). 
Braziu: Falls of St. Gabriel, Spruce 2207; Santarem, Spruce 632; Sao Paulo, Léf- 
gren 1124; Campinas, Novaes 1245; without locality, Riedel 958. 
Paraauay: Morong 519. 
78. Panicum millegrana Poir. 
Panicum hirsutum Lam. Encycl. 4: 741. 1798, not Swartz, 1797. ‘Cette plante 
croit & Cayenne, d’ou elle a ét4 envoyée par le citoyen Leblond.’’ The type, in the 
Paris Herbarium, labeled ‘‘Cayenne, Le Blond,’’ has glabrous spikelets. 
Panicum millegrana Poir. in Lam. Encycl. Suppl. 4: 278. 1816. ‘Cette plante 
croit dans Amérique méridionale (V. s. in herb. Desfont).’’? This specimen was not 
found in the Desfontaine Herbarium at Florence. In the Paris Herbarium is a 
specimen from ‘Cayenne, Martin,”’ labeled ‘“‘Panicum millegrana Poir.,’? which 
appears to be authentic and may be the type. Poiret’s description applies well to 
this plant and to the species known as P. rugulosum Trin. The spikelets are glabrous 
as in the type of that species. 
Panicum rugulosum Trin. Gram. Pan. 195. 1826. ‘Brasil (LANGsporRFF.)’’ The 
type, in the Trinius Herbarium, has glabrous spikelets. 
