516 GRAMINEA, 
Liebmann and Galeotti to A. brasiliensis, Raddi; and as Doll reduces pallida to 
brasiliensis, with the following observation concerning the plate—‘‘ad Arundinelle 
pallide Neesii specimen authenticum delineato”—it would seem that either there are 
very few really distinct American species, or there is great confusion of them in 
different works. | 
Tribe V. ZOYSEA. 
Zoysee, Benth. et Hook. Gen. Plant. iii. pp. 1075 et 1080. 
This is another small tribe, yet it is represented in America, Africa, Asia, and 
Australia, and also in Europe, though by only one species, Tragus racemosa, which has 
the same range as the whole tribe. Altogether there are thirteen genera, none of 
which numbers more than six species, and seven of them are monotypic. 
25. HILARIA. 
Hilaria, H. B. K. Nov. Gen. et Sp. i. p. 116, p. 37; Benth. et Hook. Gen. Plant. ii. p. 1121. 
An exclusively American genus of about five or six species, ranging from California 
and Texas to South Mexico. 
1. Hilaria cenchroides, H. B. K. Nov. Gen. et Sp. i. p. 117, t. 835; Rupr. in 
Bull. Acad. Brux. ix. (reprint, p. 21); Benth. Pl. Hartw. p. 28; Nees.in Linnea, xix. 
p. 686; Peyr. in Linnea, xxx. p. 3; Fourn. Mex. Pl. Enum., Gram. p. 72. 
Anthephora belangeri, Steud. Gram. p. 111, ex Munro MSS. 
Texas; New Mexico; Arizona.—NortH Mexico, San Luis Potosi (Virlet d Aoust) ; 
Sourn Mexico, Aguas Calientes (Hartweg, 251), Tacubaya (Bourgeau, 223; Schaffner, 
673), Cordillera of Oaxaca 5000 to 7000 feet (Galeotti, 5754), Real del Monte (Coulter, 
1638), Jalisco (Beechey). Hb. Kew. - 
[Hexarrhena cenchroides, Presl (Reliq. Henk. i. p. 326, t. 45), is not in the Kew 
Herbarium ; but in Bentham and Hooker’s ‘Genera Plantarum’ it is reduced from the 
figure to Hilaria, whilst Fournier retains it as a distinct genus, identifying with it an 
imperfect specimen collected by Karwinski. As a species it is quite distinct from 
Hilaria cenchroides.| | 
26. AAGOPOGON. 
Aigopogon, Humb. et Bonpl. in Willd. Sp. Pl. iv. p. 899; Benth. et Hook. Gen. Plant. iii. p. 1121; 
Fourn. Mex. Pl. Enum., Gram. p. 71. 
Schellingia, Steud. in Flora, 1850, p. 231, t. 1. 
Hymenothecium, Lag. Elench. Hort. Matr. Gen. et Sp. Nov. p. 4. 
The genus is limited to two species, ranging from Mexico to Bolivia. Fournier 
describes several slight varieties of each species, which are not distinguished here; for 
he says himself:—* In eodem specimine (Bowrgeau, 226) varietates plures apparent, 
4K. cenchroides genuinus, 4. trisetus et ZE. multisetus. Haud dubito quin 4. quingue- 
setus, R. et S. Syst. Veg. ii. p. 805 (Hymenothecium quinquesetum, Lag.), calycis valvula 
