496 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Jamaica: Troy, Hitchcock 9782. Ramble, Hitchcock 9517. Bull Head Mountain, 
Hitchcock 9548. Castleton Gardens, Hitchcock 9407. Ewarton to Linstead, 
Hitchcock 9423. Ipswich, Hitchcock 9626. Navy Island, Millspaugh 1859, 
Port Morant, Hitcheock in 1890. Portland, Harris 11524. Castleton, Harris 
11280a. Gordon Town, Hart 732. Cedar Hurst, Harris 11547. 
Lrrwarp Istanps: St. Kitts, Britton & Cowell 287 (K. U. Herb.). Guadeloupe, 
Duss 4154. Dominica, Imray 151312, Jones 20. 
WINDWARD IsLANDs: St. Vincent, Eggers 6562, 6633 (K. U. Herb.). Grenada, St. 
Georges, Broadway in 1904. Martinique, Duss 534, 4018 (both in K. U. Herb.). 
Barbados, Eggers 7195 (K. U. Herb.). 
Trinmpap: Piarco Savanna, Hitchcock 10358. Port of Spain, Hitchcock 9961, 
10045, Hart 3293. Tabaquite, Hitchcock 10121. Cedros, Amer. Gr. Nat. Herb. 
59. Arima, Hitchcock 10309. ; 
Tosaco: Brushfield, Eggers 5534. Scarborough, Hitchcock 10208. Castara, Broad- 
way 4063. Center of island, Hitchcock 10265. Spey Side, Hitchcock 10242. 
CotomsiA: Cérdoba, Pittier 557. Santa Marta, Smith 203. 
53. Panicum boliviense Hack. 
Pancium boliviense Hack. Repert. Nov. Sp. Fedde 11: 19. 1912. ‘‘Bolivia: Anta- 
huacana, Espirito Santo in alveo arenoso fluminis * * * leg. Dr. O. Buchtien no. 
2501.’’ <A portion of the type was sent by Prof. Hackel for deposit in the National 
Herbarium. 
DESCRIPTION. 
Plants perennial with long decumbent or creeping bases, rooting and branching at 
the lower nodes; flowering culms ascending, 0.5 to 1.5 meters high, glabrous, the nodes 
glabrous; sheaths short, glabrous below, usually hirsute toward the summit, especially 
at the junction with the blade, the margins ciliate; ligule a ciliate membrane about 
0.5 mm. long; blades flat, 8 to 15 cm. long, 1 to 2 cm. wide, gradually 
narrowed from the cordate-clasping base to an acuminate apex, ciliate 
at base, otherwise glabrous, obscurely cross-nerved between the veins, 
the margins scabrous; panicle usually short-exserted, 10 to 25 cm, 
long, one-third to half as wide, the solitary or fascicled branches 
increasingly approximate toward the summit of the slender angled 
scabrous axis, usually pilose in the axils, the lowermost branch soli- 
Fig. 73.—P. boli” tary and remote, all but the uppermost compound, the branchlets 
iense. From type . . . . 
specimen. somewhat spikelike, rather distant, usually along the lower side of 
the rachis, the axils pilose; spikelets subsessile, clustered, 1.5 to 1.6 
mm. long, about 0.7 mm. wide, turgid, the first glume nearly half the length of spike- 
let, the second glume and sterile lemma equal, the sterile lemma somewhat inflated, 
subtending a membranaceous palea; fruit 1.4 mm. long, 0.6 mm. wide, subacute. 
Several collections of this species were referred in the Revision! to P. laxrum as 
exceptionally robust specimens with cordate blades and turgid spikelets. 
DISTRIBUTION, 
Ditches, banks of streams, moist open 
or wooded ground, southern Mexico and 
Cuba to Paraguay. 
Veracruz: Veracruz, Hitchcock 
6582. Mirador, Liebmann 419. 
Cérdoba, Finck 3, Hitchcock 
6435, 6457. Zacuapdn, Purpus 
2159, 2160. Misantla, Purpus 
5980. Jalapa, Hitchcock 6666. - Fia, 74.—Distribution of P. boliviense. 
1 Contr. U. 8. Nat. Herb. 15: 116. 1910. 
