136 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Panicum sellowin Nees, Agrost. Bras. 153. 1829. ‘‘ Habitot in Brasilia meridionals. 
(Sellow).’’ The type, in the Berlin Herbarium, has spikelets densely pera 
pubescent with short, stiff hairs. 
Panicum beyrichi Kunth, Rév. Gram. 2: 231. pl. 27. 1830. ‘‘Crescit in nemoribus 
prope novum friburgum Brasiliz.’’ Kunth states that he received the plant under 
the name P. sellowii Nees from Beyrich who collected it. The type, in the Berlin 
Herbarium, has glabrous spikelets as in the type of P. millegrana.p 
ECniGtian lastanthum Trin. Gram. Icou. 3: pl. 245.1830. Trinius states that the figure 
‘‘ad specimen Brasilianum.’’ The type, in the Trinius Herbarium, collected in 
Brazil by Langsdorff, has papillose-hispid spikelets. 
Panicum puberulum Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 1: 277. 1834, 
‘’ not Kunth, 1829. ‘Trinius states that his specimen is from Brazil. The type, in the 
Trinius aientbenennen, collected in Brazil by Sello, has papillose-hispid spikelets as in 
the type of P. selloww. 
Panicum dispersum Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 1: 282. 1834. 
Trinius gives the locality as ‘“‘Bahiens.’’ The type, in the Trinius Herbarium, col- 
lected in Bahia, Brazil, by Riedel in 1831, is a prostrate or decumbent plant with 
glabrous spikelets. : 
Panicum expansum Trin.; Steud. Nom. Bot. ed. 2. 2: 286.1841. This is a nomen 
nudum credited to ‘‘Trin. mpt. Mexico.’”’ The type, in the Trinius Herbarium, 
labeled ‘‘Mexico, Hacienda Laguna, Schiede,’’ has glabrous spikelets. This is 
not the P. expansum of Fourn:cr@ who cites Trinius’s name as a synonym under 
P. rugulosum.» 
Panicum pilosum leiogonum Rupr. Bull. Acad. Roy. Belg. 97: 239. 1842. This 
name is listed without description. The only specimen mentioned is Galeotti 5728 
from Xalapa, Mexico. The type is in the Brussels Herbarium. This name is given 
by Fournier@ as a synonym under P. rugulosum, but Galeotti’s no. 5728 he cites¢ 
also under P. pilosum genuinum. 
Panicum sellowii longevaginatum Rupr. Bull. Acad. Roy. Belg. 9?: 239. 1842. 
Under this name, which is listed without description, Ruprecht cites two speci- 
mens, Galeotti 5726 and 5699. The first has glabrous, the second hispid spikelets. 
This name is given by Hemsley¢ and Fournieré as a synonym under P. rugulosum. 
Panicum valenzuelanum Rich. in Sagra, Hist. Cuba 11: 304. 1850. ‘‘@rescit in 
locis montosis partis occidentalis insulae Cubae Vuelta de abajo dictae * * * (Don 
José Maria Valenzuela).’’ The type, in the Richard Herbarium, labeled ‘‘ Vuelta de 
Abajo (Valenzuelana),’’ has papillose-hispid spikelets. 
Panicum probandum Steud. Syn. Pl. Glum. 1: 76. 1854. Based on “‘P. puberulum 
Trin. non Kunth.” 
Panicum rugulosum hirtiglume Griseb. Cat. Pl. Cub. 233. 1866. The only speci- 
men cited is Wright 3455. The type, in the Grisebach Herbarium, has hispidulous 
spikelets. 
Panicum rugulosum glabrescens Doell in Mart. Fl. Bras. 27: 259. 1877. As no 
specimen is mentioned, P. beyrichii Kunth, the first synonym cited, is taken as deter- 
mining the type. 
Panicum rugulosum pubescens Doell in Mart. Fl. Bras. 27: 259. 1877. No speci- 
men is mentioned. The type of the first synonym cited, P. rugulosum Trin., has 
glabrous spikelets, while Doell describes his variety as having puberulent glumes, 
hence the type of the second synonym cited, P. sellowii Nees, which has hispid 
spikelets, is taken as the type. 
@ Mex. Pl. 2: 26. 1886. d@ Biol. Centr. Amer. Bot. 3: 495. 1885. 
5 Op. eit. 21. € Mex. Pl. 2: 21. 1886. 
cOp. cit. 24. 
