538 GRAMINEA. 
18. Stipa viridula, Trin. Act. Petrop. 1836, p. 39, ex Trin. et Rupr. Sp. Gram., 
Stip. p. 57; S. Wats. in Proc. Am. Acad. xviii. p. 174. 
OREGON southward to Catirornia.—Norta Mexico, Lerios, Coahuila (Palmer, 1349). 
Hb. Kew. 
19. Stipa virletii, Fourn. Mex. Pl. Enum., Gram. p. 75. 
Norra Mexico, San Luis Potosi (Virlet d’ Aoust). 
47. ORYZOPSIS. . 
Oryzopsis, Michx. Fl. Bor.-Am. i. p. 51, t. 9; Benth. et Hook. Gen. Plant. iii. p. 1142. 
A genus of about twenty-four species, inhabiting the temperate and subtropical 
regions of the northern hemisphere and extratropical South America. 
1. Oryzopsis fimbriata, Hemsl. 
Stipa fimbriata, H. B. K. Nov. Gen. et. Sp. i. p. 126; Kunth, Revis. Gram. 1. p. 263,t. 43; Peyr. 
in Linnea, xxx. p.5; Fourn. Mex. Pl. Enum., Gram. p. 74, cum var. £. 
Milium mexicanum, Spreng.; Trin. et Rupr. Sp. Gram., Stip. p. 34. 
Souta Mexico, barranca near Santa Fé (Bourgeau, 676), near Toluca (Heller), 
Mirador (Schaffner ; Iiebmann), Real del Monte (Coulter, 1650), between Guanajuato 
and Burras (Humboldt & Bonpland). Hb. Kew. 
In Bentham and Hooker’s ‘Genera Plantarum,’ Kunth’s t. 43 is cited under Stipa, 
while the plant itself was sorted into Oryzopsis, where it is better placed than in the 
former genus. The next species is very closely allied to this, but it has a glabrous, 
almost crustaceous flowering-glume. Fournier refers Coulter’s 1654 to Stipa jimbriata, 
but it has not the broad, short florets, and is apparently specifically different. 
2. Oryzopsis fournieriana, Hemsl. 
Stipa brevicalyx, Fourn. Mex. Pl. Enum., Gram. p. 150. 
NortH Mexico, region of San Luis Potosi 6000 to 8000 feet (Parry & Palmer, 959). 
Hb. Kew. 
48. MUEHLENBERGIA. 
Muehlenbergia, Schreb. Gen. Plant. p. 44; Benth. et Hook. Gen. Plant. iii. p. 1148. 
Nearly sixty species are known, the greater part of them inhabiting North and 
Andine America, a few Central and Eastern Asia. 
1. Muehlenbergia acutifolia, Fourn. Mex. Pl. Enum., Gram. p. 86. 
Sout Mexico, Orizaba (Bourgeau, 3327). Hb. Kew. 
2. Muehlenbergia affinis, Trin. Agrostidea, ii. p. 55; Steud. Gram. p. 179; 
Fourn. Mex. Pl. Enum., Gram. p. 82. 
Muehlenbergia irichopodes, Chapm. Fl. Southern U.S. p. 553, ex Fourn. 
Carotina to Froripa.—Sovrn Mexico, Toluca (Berlandier), Santa Fé (Bourgeau, 
753 in part), Orizaba (Botteri). Hb. Kew. 
