506 



-'CONTEIBUTIONS FROM THE NATIONAL HEEBAEIUM. 



Fig. 91. — Distribution of P. trichanthum. 



DISTRIBUTION. 



' Moist thickets and river banks, Mexico, and the West Indies to Paraguay. The tj^pe 

 specimen from Mexico. 



San Luis Potosi: San Luis Poto^l to Tampico, Palmer 1151 in 1879. 



Colima: Palmer 1257 in 1891. 



Veracruz: Motzorongo, Smith 585. Veracruz, Hitchcock 6584. Jicaltepec, Lieb- 



mann 320. Coiipa, Liebmxinn 432. Without locality, Iluller 2172. 

 Campeche: Near ChamiDoton, Collins 37. 

 British Honduras: Toledo, Peck 775 (Gray Herb.). 



Guatemala: Gualan, Deam 424. Puerto Barrios, Hitchcock 9149. Morales, 



Kellerman 6272. Finca Trece 

 Aguas, Lewton 377. Cubil- 

 quitz, Tiirckheim 7798. 

 Honduras: San Pedro Sula, Thieme 



5587. 

 Nicaragua: Jinotepe, Hitchcock 



8669, 8682. 

 Costa Rica: Port Limon, Hitch- 

 cock 8434. Talamanca, Tonduz 

 8600, 8670. 

 Panama: LagunadeChiriqui, Hart 

 87. Culebra, Hitchcock 7895. 

 Frijoles, Maxon 4703. Panama, Hitchcock 9212. Tabernilla, Pittier 3824, 

 Hitchcock 8383. Gamboa, Pittier 4798. Balboa, Hitchcock 8015. 

 Cuba: Trinidad, Wright 753. Vento, Curtiss 598, Leon 557. Komelie, Eggers 



5350. 

 Jamaica: Port Antonio, Hitchcock in 1890. 

 Porto Rico: Cayey, -Sinienis 2471, C/iase 6748. Penuelas, C^ase 6487. Rio Pie- 



dras, Johnston 143. 

 Trinidad: Port of Spain, Hitchcock 9943. Cedros, Hitchcock 10146. 

 Venezuela: Tovar, Fendler 1443. 

 Colombia: Santa Marta, /SmiiA 2151. 



PARVIFOLIA. 



Perennials, usually glaucous; culms more or less decumbent; panicles small, diffuse, 

 the spikelets small, turgid or subglobose, glabrous, the first glume more than half the 

 length of the spikelet. 



Culms very slender, decumbent or creeping; blades 1 to 3 cm. 



long 69. P. parvifolium . 



Culms firm, erect or decumbent at base only; blades 3 to 8 cm. 



long 70. P. cyanescens. 



69. Panicum parvifolium Lam. 



Panicum parvifolium Lam. Tabl. Encycl. 1: 173. 1791; Contr. U. S. Nat. Herb. 15: 

 134. 1910. 



The blades in this species vary in shape from oblong or ovate-lanceolate to narrowly 

 lanceolate, in surface from glabrous to densely appressed-hirsute, and in texture from 

 thin to firm. One form, in aspect approaching P. cyanescens, has firm pubescent erect 

 blades, as much as 5 mm. wide and 4.5 cm. long. This is represented by Broadway 

 2372 in part and Hitchcock 10065, both fi'om Trinidad. Panicum brasiliense Spreng. is 

 a pubescent form with oblong-lanceolate moderately firm blades. It does not appear 

 possible to recognize this form as a distinct species. 



