18 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Panama: El Boquete, Hitchcock 8267, 8281; Maxon 4999. Chiriquf Volcano, 

 Hitchcock 8199, 8201 ; Maxon 5266. Hato del Jobo, Pittier 5422. Gatun, 

 Hitchcock 9174 ; Maxon 4653. 



Jamaica: Troy, Hitchcock 9800. Lindos Hill, Harris 11832. Ipswich, Hitch- 

 cock 9608. Upper Clarendon, Harris 12828. 



Colombia: Santa Marta, Smith 2142. 



Ecuadok: El Recreo, Eggers 15572. 



Explanation of Plate 13. — Lasiacis oaxacensis. Specimen from Santa Ana, Salvador. 

 Hitchcock 8853 (U. S. Nat. Herb. no. 946904). Natural size. 



5. Lasiacis ligulata Hitchc. & Chase. 



Panicum divaricatum y puberulum Griseb. Fl. Brit. W. Ind. 551. 1864. Based 

 on Crueger's collection from Trinidad. 



Panicum fruticosum Salzm. ; Doell in Mart. Fl. Bras. 2": 207. 1877, as synonym 

 under P. latifolium. This is based on Salzmann's no. 695 from Bahia. I have 

 not seen the type, but a specimen collected at Bahia by Salzmann, probably a 

 part of the type collection, is Lasiacis ligulata. Steudel 1 cites Salzmann's name 

 as a synonym under Panicum praegnans Steud. 



Lasiacis ligulata Hitchc. & Chase, Contr. U. S. Nat. Herb. 18: 337. 1917. The 

 designated type is from St. Anns, near Port of Spain, Trinidad (Hitchcock 

 10007). 



DESCRIPTION. 



Clambering to a height of 5 to 10 meters, the robust glabrous central cane 

 as much as 1 cm. in diameter, the wide-spreading main branches and the arcuate 

 secondary ones not in fascicles, not zigzag; sheaths ciliate on the overlapping 

 margin, otherwise glabrous ; ligule a ciliate membrane, brown, 1 to 2 mm. 

 long; blades flat, firm, 6 to 12 cm. long, 0.8 to 1.5 cm. wide, lanceolate, acumi- 

 nate, narrowed to the base, glabrous on the upper surface, puberulent beneath, 

 the margins scabrous ; panicles terminating the numerous branches, exserted or 

 partly included, oval in outline, rather open, 5 to 10 cm. long, usually half to 

 three-fourths as wide, the branches few, spreading, finally reflexed, branching 

 or flowering from near the base, usually bearing 5 to 10 short-pediceled spike- 

 lets; spikelets about 4 mm. long, obovoid and purplish black at maturity, the 

 glumes and sterile lemma as well as the fruit with a lanate tuft at the tips. 



DISTRIBUTION. 



Copses and edges of woods, Guatemala to Ecuador and Brazil ; also in Porto 



Rico. There is a specimen from Mexico (Mirador, Liebmann 298) which 



appears to be of this species, but the blades are glabrous. 



Guatemala : Cubliquitz, Turckheim 4036. 



Nicaragua: Volcan Mombacho, Baker 2454. 



Costa Rica: El General, Pittier 3365. Buenos Aires, Tonduz 3646, 6540. 

 Pacaca, Pittier 3245. Talamanca, Tonduz 9213, 9492. Sarapiqui, Biolley 

 7465. Los Palmares, Pittier 10946. Zhorquin, Tonduz 8527. Cartago, Cooper 

 571. Santa Maria de Dota, Tonduz 2247. El Sapote, Tonduz 7234. Canas 

 Gordas, Pittier 7359, 11015. 



Porto Rico: Mayaguez, Britton & Marble 678. Arecibo, Chase 6454. Cayey, 

 Chase 6734, 6747. Maricao, Sintenis 215. Luquillo Mountains, Wilson 350. 



*Syn. PI. Glum. 1: 74. 1854. 



