GRAMINEZ. 517 
exteriore 5-aristata insignis, etiam inter varietates Agopogonis cenchroidis recen- 
sendus sit.” 
1. Hgopogon cenchroides, H. B. K. in Willd. Sp. Pl. iv. p. 899; H. B. K. Nov. 
‘Gen. et Sp. i. p. 132, t. 42; Ch. et Schl. in Linnea, vi. p. 36; Rupr. in Bull. Acad. 
Brux. ix. (reprint, p. 6); Fourn. Mex. Pl. Enum., Gram. p. 72. 
LEgopogon trisetus et AL. quinquesetus, Roem. et Schult. Syst. Veg. ii. p. 805. 
Aigopogon setifer, Nees in Linnea, xix. p. 691. 
Agopogon multisetus, Griseb. ex Fourn. lL. c. 
-Hymenothecium trisetum et H. quinquesetum, Lag. Elench. Hort. Matr. Gen. et Sp. Nov. p. 4. 
Cynosurus gracilis, Cav. H. R. M.i. t. 5. fig. 3, ex Lag. 
Nortu Mexico, region of San Luis Potosi (Parry & Palmer, 942), San Miguelito 
(Schaffner); Sovran Mexico, Las Vegas, between Jalapa and Mexico (Galeotti, 5750), 
valley of Mexico (Bourgeau, 226), Real del Monte (Coulter, 1656), Zacuapan (Lieb- 
mann), Tacubaya (Schaffner), Vera Cruz to Orizaba (Miller, 2070); Guatema.a, lower 
part of Volcan de Fuego (Salvin & Godman), without locality (Bernoulli, 130).— 
‘CoLomsBra to Bottvia. Hb. Kew. 
2. Aigopogon geminiflorus, H. B. K. Nov. Gen. et Sp. i. p. 133, t. 43; Rupr. 
in Bull. Acad. Brux. ix. (reprint, p. 5); Nees in Seem. Bot. Voy. ‘ Herald,’ p. 225; 
Fourn. Mex. Pl. Enum., Gram. p. 71. 
Schellingia tenera, Steud. in Flora, 1850, p. 232, t. 1, et Syn. Gram. p. 214. 
_Aigopogon unisetus, Roem. et Schult. Syst. Veg. i. p. 805. 
Hymenothecium unisetum et H. tenellum, Lag. Elench. Hort. Matr. Gen. et Sp. Nov. p. 4. 
Cynosurus tenellus, Cav. H. R. M. i. t. 5. fig. 2, ex Lag. 
SourH Mexico, around Tacubaya (Schaffner, 689), San Nicolas, near Mexico (Bourgeau, 
1027), near Orizaba (Bourgeau, 750), without locality (Graham; Parkinson) ; Panama, 
Boquete, Veraguas (Seemann, 1561).—Cotomsia. Hb. Kew. 
27. CATHESTECUM. 
‘Cathestecum, Presl, Reliq. Henk. i. p. 294, t. 42; Benth. et Hook. Gen. Plant. ui. p. 1122 (errore 
Cathestechum). 
The genus, as far as known, is restricted to the Texano-Mexican region, and only two 
‘species have been described. 
1. Cathestecum erectum, Vasey et Hackel in Bull. Torr. Bot. Club, xi. p. 37, 
t. 45. 
Texas.—Norte Mexico, Sonora (Palmer). 
2. Cathestecum prostratum, Presl, Relig. Henk. i. p. 295, t.42; Fourn. Mex. 
Pl. Enum., Gram. p. 133. 
_ MExIco, without locality (Henke; Schaffner). 
