182 



CONTRIBUTION'S FROM THE NATIONAL HERBARIUM. 



Jamaica: Gordon Town, Hart 796, 1487. Kellits, Harris 11157. Mount Hybla, Harris 

 11380. Malvern, Harris 9739. Troy, Hitchcock 9812. Ewarton, Hitchcock 9408. 

 Cinchona, Hitchcock 9718, 9723. 



Haiti: Port au Prince, Cook, Sco field & Doyle 62, 67. Marmelade, Nash 693. 



Colombia: La Trinidad, Libano, Pennell 3359 (N. Y. Bot. Card. Herb.). 



Brazil: Goyaz, Gardner 3515. Campinas, Campos Novaes 1240. Province Minas 

 Geraes, Wid.gr en 900. Rio de Janeiro, Mertens. Santarem, Spruce. Amazonas, 

 Capanema 54414. Without locality, Burchell 4356-2, 4510; Riedel (N. Y. Bot. 

 Gard. Herb., ex Herb. Hort. Petrop., det. Trinius). 



Paraguay: Sierra de Amambay, Rojas 10141. River Apa, Hassler 11901. 



10. Chaetochloa tenacissima (Schrad.) Hitchc. & Chase. 



Schult. Mant. 2:279.1824. "In Brasilia." The 



Based on Setaria tenacissima 



Setaria tenacissima Schrad.; 

 type has not been examined. 



Panicum tenacissimum Nees, Agrost. Bras. 238. 1829. 

 Schrad. 



Chaetochloa tenacissima Hitchc. & Chase, Contr. U. S. Nat. Herb. 18: 352. 1917. 

 Based on Setaria tenacissima Schrad. 



This was included with Chaetochloa scandens by Scribner and Merrill. 1 Schrader's 

 iescriptions of the two species are much alike, but the blades of 5. scandens are 



described as subpilose, and those 

 of S. tenacissima as scabrous. The 

 bristles of S. scandens are said to be 

 twice as long as the spikelets, ami 

 those of S. tenacissima much longer. 

 These differences agree with the 

 characters of the species as here 

 segregated . 



description. 



Plants annual, mostly simple or 

 little branched ; culms erect, slender, 

 glabrous, scabrous below the panicle, 

 1 to 2 meters tall, leaning on or 

 clambering over other vegetation: 

 sheaths glabrous, antrorsely scabrous 

 toward the summit, short-hispid on 

 the margin and sparsely so on the 

 surface above, more or less hispid on 

 the collar; ligule very short, densely 

 ciliate; blades flat, very scabrous on 

 both surfaces and more or less pu- 

 bescent especially beneath, mostly 

 10 to 15 cm., sometimes as much as 

 20 cm. long, mostly not over 8 mm. 

 wide, gradually tapering from about 

 the middle to the long-acuminate apex, rather abruptly narrowed at base; panicles 

 somewhat nodding or flexuous, rather densely flowered above, somewhat interrupted 

 toward the base, a little tapering toward the summit, as much as 15 cm. long and 1 cm. 

 thick (excluding bristles), the axis densely pubescent and sparsely villous with long 

 weak hairs; clusters of branchlets rather loose, 3 to 5 mm. long, dividing 2 or 3 times, 



Fig. 45. — Chaetochloa tenacissima. From Ainer. Gr 

 Herb. 610, Trinidad. 



1 U. S. Dept. Agr. Div. Agrost. Bull. 21: 17. 1900. 



