542 GRAMINEA. 
23. Muehlenbergia rigida, Trin. Gram. Unifl. p.194; Fourn. Mex. Pl. Enum., 
Gram. p. 82. 
Podosemum rigidum, H. B. K. Nov. Gen. et Sp. i. p. 129. 
Trichochloa rigida, Reem. et Schult. Syst. Veg. ii. p. 386. 
Agrostis rigida, Spreng. Syst. Veg. i. p. 262. 
SourH Mexico, Santa Rosa (Humboldt & Bonpland), near Pefiol de los Bafios (Bour- 
geau, 675, 753), Orizaba (Miller, 2100). Hb. Kew. 
24. Muehlenbergia scabra, S. Wats. in Proc. Am. Acad. xviii. p. 174. 
NortH Mexico, San Luis Potosi (Schaffner, 1067). Hb. Kew. —— 
25. Muehlenbergia schaffneri, Fourn. Mex. Pl. Enum., Gram. p. 85. 
Sour Mexico, near Tacubaya and at Mirador (Schaffner). Hb. Kew. 
26. Muehlenbergia setarioides, Fourn. Mex. Pl. Enum., Gram. p. 84. 
SoutH Mexico, Orizaba (Thomas ; Miiller, 2022: Botteri, 1202; Bourgeau, 3362), 
Sierra de Christobal, near Eugenio (Schaffner). Hb. Kew. 
27. Muehlenbergia spiciformis, Trin. Agrostidea, ii, p. 42; Fourn. Mex. Pl. 
Enum., Gram. p. 86. 
Norra Mexico, San Luis Potosi (Virlet d’Aoust); Sour Mexico, Orizaba (Miller, 
2100 in part), valley of Mexico (Schaffner). Hb. Kew. 
28. Muehlenbergia stipoides, Trin. Gram. Unifl. p. 194; Kunth, Enum. Pl. 
i. p. 201; Fourn. Mex. Pl. Enum., Gram. p. 83. 
Podosemum stipoides, H. B. K. Nov. Gen. et Sp. i.p. 181. 
Trichochloa stipoides, Roem. et Schult. Syst. Veg. ii. p. 388. 
Agrostis stipoides, Spreng. Syst. Veg. i. p. 263. 
South Mexico, Desierto Viejo (Bouwrgeau, 1152), peak of Orizaba at 8000 feet. 
(Liebmann), without locality (Schaffner)—Ecuapor. Hb. Kew. 
29. Muehlenbergia stricta, Kunth, Enum. Pl. i. p. 202; Fourn. Mex. Pl. 
Enum., Gram. p. 82, cum var. B. 
Podosemum strictum, Presl, Relig. Heenk. i. p. 280. 
Muehlenbergia capillaris, Trin. Gram. Unifl. p. 191, ex Fourn. 
Tzxas.—Sourn Mexico, Orizaba (Botteri, 1262: Schaffner ; Bourgeau, 3141), Mira- 
dor (Liebmann), Consoquitla (Liebmann). Hb. Kew. 
30. Muehlenbergia subtilis, Nees in Linnea, xix. p. 689; Fourn. Mex. PI. 
Enum., Gram. p. 84. | 7 
SoutH MExi0o, without locality (Aschenborn). 
31. Muehlenbergia tenella, Trin. Gram. Unifl. p. 192; Kunth, Enum. Pl. i. 
p. 199; Fourn. Mex. Pl. Enum., Gram, p. 83. 
Podosemum tenellum, H. B. K. Nov. Gen. et Sp. i. p. 128. 
Trichochloa tenella, Roem. et Schult. Syst. Veg. ii. p- 385. 
Polypogon tenellus, Spreng. Syst. Veg. i. p. 243. 
