GRAMINEZ. 543 
Sout Mexico, between Rio Frio and Barranca de Honda, 7300 feet (Humboldt & 
Bonpland), without locality (Ziebmann). 
32. Muehlenbergia tenuifolia, Trin. Gram. Unifl. p. 193; Kunth, Enum. Pl. 
i. p. 199; Fourn. Mex. Pl. Enum., Gram. p. 84. 
Calamagrostis tenuifolia, H. B. K. Nov. Gen. et Sp. i. p. 184. 
Podosemum tenuifolium, Nees in Linnea, xix. p. 690. 
Arundo tenuifolia, Roem. et Schult. Syst. Veg. ii. p. 510. 
Arundo tenella, Spreng. Pugil. ii. p. 6. 
Sout Mexico, near the city of Mexico at 7000 feet (Humboldt & Bonpland), with- 
out locality (Aschenborn). 
33. Muehlenbergia tenuissima, Kunth, Enum. Pl. i. p.198; Trin. Agrostidea, 
ii. p. 39; Fourn. Mex. Pl. Enum., Gram. p. 86. 
Podosemum tenuissimum, Presl, Reliq. Henk. i. p. 280. 
Mexico and Panama (ex Pres/). 
34. Muehlenbergia trinii, Fourn. Mex. Pl. Enum., Gram. p. 84. 
Muehlenbergia diversiglumis, Trin. Agrostidea, ii. p. 52. 
Soutn Mexico, Rio Blanco, near Orizaba (Bourgeau, 3369), Orizaba (Bottert, 1273, 
1278). Hb. Kew. 
35. Muehlenbergia virescens, Trin. Gram. Unifl. p. 193; Kunth, Enum. PI. 
1. p. 202; Fourn. Mex. Pl. Enum., Gram. p. 87. 
Podosemum virescens, H. B. K. Nov. Gen. et Sp. i. p. 182. 
Trichochloa virescens, Roem. et Schult. Syst. Veg. ii. p. 389. 
Agrostis nutans, Spreng. Syst. Veg. 1. p. 263, pro parte. 
SoutH Mexico, near Santa Rosa de la Sierra and Puerto de Varientos, 7800 feet 
(Humboldt & Bonpland). 
[Milium microspermum, Lagasca, and IM. sparsa, Miller, Steud. Gram. p. 34, are 
obscure Mexican grasses, possibly of the genus Muehlenbergia. | 
49, PERIEILEMA. 
Perieilema, Presl, Relig. Heenk. i. p. 233, t. 37. fig. a (Pereilema) ; Benth. et Hook. Gen. Plant. 
ii. p. 1144. 
An exclusively American genus of three or four species, ranging from Mexico to 
Brazil. 
1. Perieilema ciliatum, Fourn. Mex. Pl. Enum., Gram. p. 93. 
Sourn Mexico, Orizaba (Bourgeau, 3328 ; Miller, 2073; Bottert), Cordova (Schaffner). 
Hb. Kew. 
