GRAMINEA, 555 
7000 feet (Humboldt & Bonpland), near Tacubaya and Chapultepec (Schaffner), 
Orizaba (Bourgeau, 217 ; Miller, 2113; Schaffner), at 8000 to 10,000 feet (Liebmann), 
Chinantla, Talea, and Sempoaltepec (Liebmann). Hb. Kew. 
11. Deyeuxia viridis, Fourn. in Bull. Soc. Bot. France, xxiv. p. 181, et Mex. 
Pl. Enum., Gram. p. 105. 
Trisetum viride, Kunth, Revis. Gram. i. p. 101; Enum. Pl. i. p. 296, et Suppl. p. 250. 
Avena viridis, H. B. K. Nov. Gen. et Sp. i. p. 147. 
SoutH Mexico, in the elevated plain between Salamanca and Queretaro, 5400 feet 
(Humboldt & Bonpland). 
Tribe IX. AVENE. 
Avenee, Benth. et Hook. Gen. Plant. iii. pp. 1076 et 1086. 
There are twenty-two genera of this tribe, comprising about 300 species, spread over 
the whole area of the Order. Danthonia is the largest genus, numbering about 100 
species, very widely dispersed in the temperate and tropical regions of both hemispheres, 
though it is not, as far as we know, represented within our limits. Six of the genera 
are monotypic, and three of these endemic in Australia. 
59. DESCHAMPSIA. 
Deschampsia, Beauv. Agrostogr. p. 91, t. 18. fig. 18 ; Benth. et Hook. Gen. Plant. iii. p. 1157. 
About twenty species, widely dispersed in the temperate and frigid zones of both 
hemispheres, rarer on the mountains within the tropics. One species, D. cwspitosa, 
covers nearly the whole area of the genus, and may yet be found in Mexico. 
1. Deschampsia kelerioides, Benth. et Hook. Gen. Pl. iii. p. 1158. 
Aira kelerioides, Peyr. in Linnea, xxx. p. 5. 
Peyritschia kelerioides, Fourn. Mex. Pl. Enum., Gram. p. 110. 
Souta Mexico, Toluca at 8800 feet (Heller). 
60. TRISETUM. 
Trisetum, Pers. Syn. Pl. i. p. 97; Benth. et Hook. Gen. Plant. iii. p. 1159. 
A genus of nearly fifty species, inhabiting temperate regions of both hemispheres, 
including mountains within the tropics. 
1. Trisetum bambusiforme, Fourn. Mex. Pl. Enum., Gram. p. 108. 
Sout Mexico, Desierto Viejo, near Mexico (Bourgeau, 1304). Hb. Kew. 
2. Trisetum elongatum, Kunth, Revis. Gram. i. p. 101; Rupr. in Bull. Acad. 
Brux. ix. (reprint, p. 7), ex Fourn. Mex. Pl. Enum., Gram. p. 108. 
Avena elongata, H. B. K. Nov. Gen. et Sp. i. p. 148. 
SoutH Mexico, near Chapultepec 7170 feet (Humboldt & Bonpland), near Las Vigas, 
462 
