552 , GRAMINEZ. 
Norte Mexico, San Luis Potosi (Virlet dAoust); Sourn Mexico, Toluca 7000 to 
8000 feet (Humboldt & Bonpland), Tacubaya (Schaffner), Orizaba 14,000 feet (Lieb- 
mann), 12,500 feet (Galeotti, 5775). 
Trinius (Joc. cit. p. 74) cites A. tolucensis as a synonym of A. virescens. 
13. Agrostis varians, Trin. Agrostidea, ii. p. 68 ; S. Wats. Bot. Calif. ti. p. 273; 
Fourn. Mem. Pl. Enum., Gram. p. 99. 
Agrostis michaucii, var. alpina, Rupr. in Bull. Acad. Brux. ix. (reprint, p. 2). 
Orxcon to CALrrornis.—Souta Mexico, peak of Orizaba at the limits of phanerogamic 
vegetation, 12,000 to 12,500 feet (Galeotti, 5767 ; Liebmann). 
14, Agrostis verticillata, Vill. Delph. p. 74; Trin. Sp. Gram. Ic. et Descr. 
t. 36, et Agrostidea, ii. p. 112; Benth. Pl. Hartw. p. 346; S. Wats. Bot. Calif. ii. 
p. 272; Fourn. Mex. Pl. Enum., Gram. p. 96. 
Agrostis dulcis, Sibth. ex Kunth, Enum. PI. i. p. 218; Nees in Linnea, xix. p. 670; Benth. Pl. 
Hartw. p. 28. 
Vilfa dulcis, Beauv. Agrostogr. p. 16; H. B. K. Nov. Gen. et Sp. i. p. 138. 
Agrostis vulgaris, y. dulcis, Pers. Syn. Pl. i. p. 75. 
Texas to Cauirornia.—Norra and Sovrn Mexico, common.—Evurope; MApzira; 
Canartes; NortH AFrica; and WESTERN Asta. Hb. Kew. 
15. Agrostis virescens, H. B. K. Nov. Gen. et Sp. 1. p. 135; Trin. Agrostidea, 
ii. p. 74, excl. syn.; Rupr. in Bull. Acad. Brux. ix. (reprint, p. 3), var. pumila ; Fourn. 
Mex. Pl. Enum., Gram. p. 95. 
Sout Mexico, Toluca 7000 to 8000 feet (Humboldt & Bonpland), without locality 
(Liebmann), peak of Orizaba, 12,500 feet (Galeotts, 5775). 
16. Agrostis virletii, Fourn. Mex. Pl. Enum., Gram. p. 96 (varietates a, £, 
et y). 
Norta Mexico, San Luis Potosi (Virleé d’Aoust); South Mexico, Tacubaya and 
Guazimalpan (Schaffner). 
56. POLYPOGON. 
Polypogon, Desf. Fl. Atl. i. p. 66; Benth. et Hook. Gen. Plant. i. p. 1150. 
About ten species, now very widely dispersed in temperate and subtropical regions, 
rarer within the tropics. P. monspeliensis and some others colonize very freely, espe- 
cially in maritime districts. 
1. Polypogon brachyphyllus, Fourn. Mex. Pl. Enum., Gram. p. 91. 
Podosemum brachyphyllum, Nees in Linnea, xix. p. 690. 
Agrostis brachyphylla, Steud. Gram. p. 175. 
Mexico, without locality (Aschenborn). 
2. Polypogon elongatus, H.B.K. Nov. Gen. et Sp. i. p. 134; Rupr, in Bull. 
