564 GRAMINEA, 
11. Bouteloua triathera, Benth. in Journ. Linn. Soc. xix. p. 104, et in Benth. 
et Hook. Gen. Pl. iii. p. 1169. 
Triena racemosa, H. B. K. Nov. Gen. et Sp.i. p. 178, t.61; Fourn. Mex. Pl. Enum., Gram. p. 141. 
Triathera americana, Desv. Journ. Bot. 1813, i. p. 67; Beauv. Agrostogr. p. 39, t. 9. fig. 4, fide 
Benth. 
Atheropogon triena, Spreng. Syst. Veg. i. p. 293. 
Eutriana triena, Trin. ex Steud. Gram. p. 216. 
Sour Mexico, between Guanajuato and Villalpando 6400 feet (Humboldt & Bon- 
pland).—San Domingo. 
[Triathera gracilis, Fourn. (Mex. Pl. Enum., Gram. p. 141), from Cuernavaca, 
Chapulco, and San Lorenzo, near Tehuacan (Liebmann), is described as distinct from 
the present plant. | 
12. Bouteloua trifida, Thurber, ex S. Wats. in Proc. Am. Acad. xviii. p. 177. 
Texas ; New Muxico.—Nortu Mexico, Monclova, Coahuila (Palmer, 1355), region 
of San Luis Potosi (Parry & Palmer, 945). Hb. Kew. 
70. CHONDROSIUM. | 
Chondrosium, Desv. ; Benth. et Hook. Gen. Plant. iii. p. 1168, sectio Bouteloue. 
Species Fourneriane not identified: see remarks under Bouteloua, ante, p. 560. 
1. Chondrosium exile, Fourn. Mex. Pl. Enum., Gram. p. 137. 
Mexico, without locality (Berlandier). 
2. Chondrosium karwinskii, Fourn. Mex. Pl. Enum., Gram. p. 137. 
Texas.—Sovrn Mexico, La Miquiguana (Karwinski). 
3. Chondrosium virletii, Fourn. Mex. Pl. Enum., Gram. p. 136. 
NortH Mexico, San Luis Potosi (Virlet d’ Aoust). 
71. ATHEROPOGON. 
Atheropogon, Muehlenb.; Benth. et Hook. Gen. Plant. iii. p. 1168, sectio Bouteloue. 
Species Fourneriane not identified: see remarks under Bouteloua, ante, p. 560. 
1, Atheropogon acuminatus, Fourn. Mex. Pl. Enum., Gram. p. 139. 
Sour Mexico, Mirador and Potrero de Consoquitla (Liebmann). 
2. Atheropogon filiformis, Fourn. Mex. Pl. Enum., Gram. p. 140. 
Souta Mzxtco, Hacienda de Naranja (Karwinksi), Consoquitla (Liebmann). 
8. Atheropogon medius, Fourn. Mex. Pl. Enum., Gram. p. 139. 
South Mexico, between San Miguel and Sadani (Liebmann), Hacienda del Limon 
(Karwinski). 
4. Atheropogon polymorphus, Fourn. Mex. Pl. Enum., Gram. p. 141. 
Norta Mexico, San Luis Potosi (Virlet d’ Aoust). 
