HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 123 



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



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

 Peru: Pbppig ^Trinius Herb.). 

 Bolivia: Mapiri, Rusby 229. 



66. Panicum pulchellum Raddi. 



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

 non procul ab Urbe Rio de Janeiro." 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 t K\m.th, Rev. Gram. 1: 30. 1829. Based on Panicum pulchellum 

 Raddi. 



Panicum leptostachyum Presl, Rel. Haenk. 1: 311. 1830. u Hab. in Mexico." The 

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



DESCRIPTION. 



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. pulchellum. ., 5 ' . . Z j ^ 



From Raddi's specimen in than Wlde > 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, 



Tuerckheim 7702, 8794; El Palmar, Kellerman 6246. 

 Costa Rica: Boruca, Pittier 4459, Tonduz 4460 in part; Cafias Gordas, Pittier 7360; 



Buenos Aires, Tonduz 4881. 

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

 Bolivia: Guanai, Rusby 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. 



