HITCHCOCK AND CHASE NOETH AMERICAN PANICUM. 123 



Brazil: Bahia, Salzmann; Rio Janeiro, Wilkes Expl. Exped. 11; Sao Paulo, Lof- 



gren & Edwall 2803; Porto Alegre, Reinech & Czermak 241. 

 Peru: Poppig (Trinius Herb.)- 

 Bolivia: Mapiri, Rushy 229. 



^ 66. Panicum pulchellum Raddi. 



Panicum pulchellum Raddi, Agrost. Bras. 42. 1823. "In sylvaticis prope Catumby, 

 non procul ab Urbe Rio de Janeiro y There is a specimen in the herbarium of the 

 British Museum marked "Panicum pulchellum Rad. Rio Janeiro. Raddi" which 

 appears to be authentic, but probably is not the type. 



Eriochloaf pulchella Kunth, Rev. Gram. 1: 30. 1829. Based on Panicum pulchellum 

 Raddi. 



Panicum leptostachyum Presl, Rel. Haenk. 1: 311. 1830. "Hah. in Mexico.'^ The 

 type, in the herbarium olthe Bohemian Museum, is labeled "Mexico." 



Plants apparently perennial, decumbent or creeping at base; culms slender, rather 



freely branching, ascending, pubescent in lines or glabrate, the nodes bearded; 



sheaths short, softly pubescent or glabrate; ligules ciliate, 



about 0.3 mm. long; blades thin, spreading, 1.5 to 4 cm. 



long, 4 to 15 mm. wide, rather abruptly acuminate, un- 



symmetrically subcordate; panicles oblong, 2 to 12 cm. 



long, rarely over 2 cm. wide, the racemes 5 to 15 mm. long, 



all about the same length, ascending or finally spreading, 



distant or approximate toward the summit; spikelets 1.8 to 



, , 2 mm. long, about 0.8 mm. wide, turgid but not thicker 



Fig. 116. -p. vulchellum. ^' .,,,!,■,. . ^. 



From Raddi's specimen in ^^^n Wide, hispid, the hairs longer toward the margin; 



British Museum. first glume one-third to half the length of the spikelet, 



acute, 3-nerved; second glume and sterile lemma sub- 

 equal, acute, the latter bearing at either side of the midnerve a crateriform gland, the 

 sterile palea about three-fourths as long as its lemma; fruit 1.3 mm. long, 0.6 mm. 

 wide, rather blunt. 



DISTRIBUTION. 



Woods and savannas, Mexico to Brazil and Bolivia. 



Mexico: Cordoba, Bourgeau 1455; Minatitlan, Smith 589 (Hitchcock Herb.). 

 Guatemala: Dept. Alta Vera Paz, Cook & Griggs 284, Maxon & Hay 3153, 



Tuerclheim 7702, 8794; El Palmar, Kellerman 6246. 

 Costa Rica: Boruca, Pto'er 4459, Totic^ms; 4460 in part; CaiiasGordas, PiWier 7360; 



Buenos Aires, Tonduz 4881. 

 Brazil: Rio Janeiro, Raddi (British Mus. Herb.). 

 BoLiVLA.: Guanai, Rushy 217. 



67. Panicum biglandulare Scribn. & Smith: ' ' 



Panicum biglandulare Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. Bull. 4: 13. 

 pi. 4- 1897. "Near Pinabete, Chiapas, February 8, 1896, at an altitude of 6,500 to 

 8,000 feet; No. 3781," collected by E. W. Nelson. The type, in the National Herba- 

 rium, is a culm 120 cm. long, bearing two ascending branches about the middle, the 

 lower portion being naked. 



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