GRAMINEA, 557 
62. TRISTACHYA. 
Tristachya, Nees, Agrostol. Bras. p. 458; Benth. et Hook. Gen. Plant. iii. p- 1161. 
About eight species are known, two of which inhabit Tropical America, and the rest 
Tropical and South Africa and West Asia. 
1. Tristachya leiostachya, Nees, Agrostol. Bras. p. 459; Kunth, Revis. Gram. 
i. t. 140, et Enum. Pl. i. p. 308; Déll in Mart. Fl. Bras. ii. 8, p. 106. 
Tristachya mexicana, Kunth, Enum. Pl. i. p. 308, et Suppl. p. 259 ; Fourn. Mex. Pl. Enum., Gram. 
p- 111. 
Monopogon avenaceus, Presl, Reliq. Henk. i. p. 325, t. 44. 
Sovta Mexico, Villa Alta, Oaxaca (Liebmann). Hb. Kew. 
Tribe X. CHLORIDE, 
Chloridee, Benth. et Hook. Gen. Plant. iii. pp. 1076 et 1087. 
This Tribe is generally spread, except in the colder regions, though rare in Europe. 
There are twenty-eight genera, thirteen of which are monotypic, and six of these are 
_ African. Altogether only about 150 species are known. 
63. MICROCHLOA. 
Microchloa, R. Br. Prodr. Fl. Nov. Holl. p. 208; Benth. et Hook. Gen. Plant. iii. p. 1168. 
Species three, one widely spread, and the others restricted to Tropical and South 
Africa. 
1. Microchloa setacea, R. Br. Prodr. Fl. Nov. Holl. p. 208; H. B. K. Nov. 
Gen. et Sp. i. p. 84, t. 22; Kunth, Enum. Pl. i. p. 258, et Suppl. p. 201; Peyr. in 
Linnea, xxx. p.5; Fourn. Mex. Pl. Enum., Gram. p. 135; S. Wats. in Proc. Am. 
Acad. xviii. p. 176. 
Norra Mexico, region of San Luis Potosi (Parry & Palmer, 970); Sour Mexico, 
valley of Mexico (Bourgeau, 446), Mirador (Liebmann), Vera Cruz to Orizaba (Miller, 
2077).—Bouivia ; Braziu; Norra Avstrauia; TropicaL Arrica and Asia. Hb. Kew. 
64. CYNODON. 
Cynodon, Pers. Syn. Plant. i. p. 85; Benth. et Hook. Gen. Plant. iii. p. 1164, 
In addition to the following there are three endemic Australian species. 
1. Cynodon dactylon, Pers. Syn. Pl.i. p. 85; Doll in Mart. Fl. Bras. ii. 3, p. 77; 
Griseb. Fl. Brit. W. Ind. p. 540; Benth. Fl. Austr. vii. p. 609 ; Fourn. Mex. Pl. Enum., 
Gram. p. 142. 
This grass is now common in nearly all Tropical and SuprropicaL and in some 
‘TEMPERATE COUNTRIES, including Mexico. Hb. Kew. 
