522 _° GRAMINEZ, 
1. Hemarthria fasciculata, Kunth, Revis. Gram. i. p. 153; Hack. in Mart. 
FI. Bras. ii. 8, p. 314, t. 72. fig. 2; Fourn. Mex. Pl. Enum., Gram. p. 67. 
Sours Mexico, Vera Cruz (Gouin), Orizaba (Bottert; Schaffner) —Braziu. Also a 
native of Arrica, South Europe, and some parts of Asta, and very closely allied to the 
Australian Hemarthria compressa, R. Br. We have seen no Mexican specimens. 
38. ISCHAMUM. 
Ischemum, Linn. Gen. Plant. n. 1148; Benth. et Hook. Gen. Plant. ii. p. 11382. 
A genus of about thirty species very widely diffused in the warmer regions of both 
hemispheres. 
1. Ischemum: latifolium, Kunth, Revis. Gram. i. p. 371, t. 99; Hack. in Mart. 
Fl. Bras. i. 8, p. 261; Fourn. Mex. Pl. Enum., Gram. p. 55. 
Andropogon latifolius, Spreng. Syst. Veg. i. p. 286; Steud. Gram. p. 382. 
Spodiopogon latifolius, Nees, Agrostol. Bras. p. 360. 
Ischemopogon latifolius, Griseb. Fl. Brit. W. Ind. p. 560. 
SoutH Mexico, Orizaba (Bourgeau, 3136; Botteri), Oaxaca (Galeotti, 5861), Misantla 
(Schiede & Deppe), Cordova (Bourgeau, 2203); Nicaragua, Greytown (Tate, 555).— 
Ecuapor; Peru; Brazit, and the West Inpizs. Hb. Kew. 
39. TRACHYPOGON. 
Trachypogon, Nees, Agrostol. Bras. p. 341, pro parte; Benth. et Hook. Gen. Plant. iii. p. 1183. 
Concerning this genus, Bentham and Hooker observe :—“Species 11 enumerat 
Andersson in Cifvers. K. Vet.-Akad. Stockh. 1857, p. 46, quarum una Africe australis, 
ceeteree Americe tropice et subtropice a Brasilia usque ad Mexicum incole; plures 
tamen vix inter se distinguende et a Hackelio (in litt.) omnes in unam junguntur.” 
Subsequently Hackel (in Mart. FI. Bras. ii. 3, p. 263) actually united all the Brazilian 
forms at least under the name of Trachypogon polymorphus, distinguishing, however, 
five primary and numerous secondary varieties. In this sense the species includes 
T. canescens, Nees, T. montufari, Nees, T. dactyloides, Fourn., and T. angustifolius, 
Fourn., and probably also 7. miilleri, Fourn., T. gouini, Fourn., and T. dissolutus, Nees, 
though these names are not actually cited as synonyms. We have not critically 
examined the specimens, but all the Mexican and Central American that we have 
seen may well belong to one species; indeed they present no obvious distinctions. 
Nevertheless, as we have not seen Fournier’s types, and as his names are already 
published, we prefer following him in this place. 
1. Trachypogon angustifolius, Fourn. Mex. Pl. Enum., Gram. p. 66. 
Andropogon angustifolius, H. B. K. Nov. Gen. et Sp. i. p. 184; Kunth, Enum. Pl. i. p, 4. 
Trachypogon polmorphus, var. 8. montufari, subvar. 4, Hack. in Mart. Fl. Bras. ii. 2, p. 265. 
SoutH Mzxico, Santa Rosa et Los Joares at 8040 feet (Humboldt & Bonpland). 
