HITCHCOCK GRASSES OF CUBA. 223 



21. Panicum hirtivaginum sp. nov. 



Culm erect (apparently from a perennial base), ascending-hirsute, 60 to 80 cm. 

 tall, the nodes densely hirsute; sheaths hirsute like the culms: ligule bristly; blades 

 flat, hirsute on both surfaces or glabrescent, scarcely scabrous on the margins, elon- 

 gated, erect or ascending, as much as 60 cm. long, and 12 mm. wide; panicle dif- 

 fuse, 20 to 30 cm. long, branches ascending, these and the main axis glabrous or 

 somewhat scabrous; spikelets on pedicels 1 to 3 mm. long, ovate-acuminate, gla- 

 brous, about 3 mm. long; lower glume ovate, strongly 5-nerved, somewhat over 

 1 mm. long; upper glume and sterile lemma equal, strongly 7 and 9-nerved, the 

 palea of the latter delicate, about hah as long; fertile lemma chartaceous, smooth, 

 acute, nearly 2 mm. long, inrolled at the margins and including the margins of the 

 palea; fruit brown at maturity. 



Type specimen Wright 758, Cuba, U. S. National Herbarium no. 559958. Other 

 specimens are: Santiago de las Vegas, Tracy 9116; Habana, Tracy 9068; Wright 3860 

 in Gray Herbarium; Cienfuegos, Combs 259 in Gray Herbarium. In the herba- 

 rium of the New York Botanical Garden are: Santiago de Cuba, Hamilton 230; Alto 

 Cedro, Underwood & Earle 1611; Madruga, Britton & Shafer 745; Eggers 5406. 



Wright's 758 is listed in Sauvalle's Flora Cubana as P. rudgei Roem. & Schult., 

 which species apparently does not occur in Cuba. The two specimens of Wright 

 758 in the Sauvalle Herbarium are labeled "In low ground beside rivulets, savannas 

 of Guamaroca, July 25," and "In fields, Retiro, Oct. 11." The Grisebach speci- 

 men of this species is numbered 281 and was collected in 1865. 



This species differs from P. hirsutum Sw. in its smaller culms, hirsute blades, 

 more diffuse panicle, and larger spikelets. 



22. Panicum lancearium Trin. Clav. Agrost. 234. 1822. 



Panicum nashianum Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 7: 79. 1897. 



Wright 3460; Wright 3461 in part. 



Wright's 3460 and 3461 in part, in the Krug and Urban Herbarium belong to this 

 specie's. There is a specimen of this in the Grisebach Herbarium from eastern Cuba, 

 numbered "101=3460" and labeled " Panicum dichotomum var. nodiflorum Lam. 

 forma glabresc". Wright's 3460 in the Gray Herbarium is. labeled "Pinal. San Juan 

 de Buenavista, Nov. 21." 



23. Panicum laxum Sw. Prod. 23. 1788. 



Panicum agrostidiforme Lam. Tabl. Encycl. 1: 172. 1791. 



Panicum tenuiculmum Meyer, Prim. Fl. Esseq. 58: 1818. 



Panicum polygonatum Schrad. in Schult. Mant. 2: 256. 1824. 



Panicum diandrum Kunth, Rev. Gram. 2: 323. 1829. 



Panicum ramulijlo rum Hochst.; Steud. Syn. PI. Glum. 1: 65. 1854. 



Wright 759, 3856, 3862 in part, 3863 in part; Santiago de Las Vegas, Tracy 9114, 

 Hitchcock in 1906; Guanabacoa, Leon 190; Las Acostas, Bah r IK 5240; Province Santa 

 Clara, Baker HC 2477, 2482; Isle of Pines, Palmer & Riley 1069, Taylor 37, Curtiss 464; 

 Herradura, Hitchcock in 1906, Tracy 9059, 9062, 9072, 9099, Caldwell & Baker 7136; 

 Pinar del Rio, Baker HC 1699 ; Cienfuegos, Combs 321 in Gray Herbarium. The follow- 

 ing are in the Herbarium of the New York Botanical Garden: Pinar del Rio, Shafer 

 323; Isle of Pines, Curtiss in 1904; Sagua, Britton d: Wilson 300; Guajay, Earle & 

 Wilson 343. 



Wright's 759 in National Herbarium is labeled "Savannas, Retiro, Oct. 11." There 

 are four specimens in the Grisebach Herbarium: Western Cuba, collected in 1863, 

 "893=759;" eastern Cuba, 1S59, no. 75!): "Hanabana, May 22, 1865, 189;" "Wet- 

 among tall Cyperaceae, Hanabana, May 25, L865, L96." Wright's 3862 in the Gray Her- 

 barium consists of two specimens, one of which is /'. laxum, the other /'. condensum. 

 Wright's 759 in the Gray Herbarium has three printed blank labels, for the years 1856- 

 57, 1859, and 1860-64. 



