496 



CONTEIBUTIONS FEOM THE NATIONAL HEEBAPJUM. 



Jamaica: Troy, Eitchcoch 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, Hitchcock in 1890. Portland, Harris 11524. Castleton, Harris 

 11280a. Gordon Town, Hart 732. Cedar Hurst, Harris 11547. 



Leeward Islands: St. Kitts, Britton & Cowell2S7 (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, JDiiss 534, 4018 (both in K. U. Herb.). 

 Barbados, Eggers 7195 (K. U. Herb.). 



Trinidad: Piarco Savanna, Hitchcock 10358. Port of Spain, Hitchcock 9961, 

 10045, Hart 3293. Tabaquite, Hitchcock 10121. Cedros, Amer. Gr. Nat. Herb. 

 59. Arima, Hitchcock 10309. 



Tobago: Brushfield, Eggers 5534. Scarborough, Hitchcock 10208. Castara, Broad- 

 way 4063. Center of island, Hitchcock 10265. Spey Side, Hitchcock 10242. 



Colombia: Cordoba, Pittier 557. Santa Maxta, -Smith 203. 



53. Panicum boUviense Hack. 



Pancium boUviense Hack. Repert. Nov. Sp. Fedde 11: 19. 1912. "Bolivia: Anta- 

 huacana, Espirito Santo in alveo arenoso fluminis * * * leg. Dr. 0. 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 ciHate 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, ciUate 

 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- 

 tary and remote, all but the uppermost compound, the branchlets 

 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 refeiTed in the Revision^ to P. laxum 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. 'M.irador,Liebmann419. 

 Cordoba, Finck 3, Hitchcock 

 6435,6457. Za.cna'pan, Purpus 

 2159, 2160. Misantla, Pur pus 

 5980. J a}&-pa, Hitchcock 6666. Fig. 74.— Distribution oi P. &oHwense. 



Fig. 73.— p. boUv- 

 iense. From type 

 specimen. 



1 Contr. U. S. Nat. Herb. 15: 116. 1910. 



