GRAMINEA. 519 
31. IMPERATA. 
Imperata, Cyr. Pl. Rar. Ic. ii. p. 26, t. 11, fide Parlat. Fl. Ital. i. p. 186; Benth. et Hook. Gen. 
Plant. iii. p. 1125. 
Syllepis, Fourn. Mex. Pl. Enum., Gram. p. 52. 
Three or four species widely dispersed in the tropical and subtropical regions of both 
hemispheres, and in the Old World extending into temperate regions in South Europe, 
China, and Japan. 
1. Imperata brasiliensis, Trin. in Mém. Acad. Pétersb. sér. 6, ii. p. 331, ex 
Hack. in Mart. Fl. Bras. ii. 3, p. 251, t. 59. 
Imperata brasiliensis, var. mexicana, Rupr. in Bull. Acad. Brux. ix. (reprint, p. 19). 
Syllepis ruprechtii, Fourn. Mex. Pl. Enum., Gram. p. 52. 
Imperata arundinacea, var. americana, Anderss. in CGifvers. af Kongl. Vetensk.-Akad. Foérh. 1855, 
p- 160, fide Fourn. 
SoutH Mexico, meadows around Zacuapan (Galeotti, 5678).—Southward to BrRaziu. 
Hb. Kew. 
This is hardly more than a variety of J. arundinacea, Cyr., which is very widely 
spread in the temperate and tropical regions of the Old World, including Australia. 
2. Imperata caudata, Trin. in Mém. Acad. Pétersb. sér. 6, ii. p. 331, ex Hack. 
in Mart. Fl. Bras. ii. 8, p. 251; Griseb. Fl. Brit. W. Ind. p. 561. 
Saccharum contractum et S. dubium, H. B. K. Nov. Gen. et Sp. i. pp. 182 et 183. 
Syllepis polystachya, Fourn. Mex. Pl. Enum., Gram. p. 52, excl. syn. Swartz. 
Sout Mexico, Vera Cruz (Gouin); Panama, Empire Station (S. Hayes, 257).—South- 
ward to Braziu and in the West Inpizs. Hb. Kew. 
It is singular that Fournier reduces, with the sign of certainty, Saccharum poly- 
stachyum, Swartz, to his genus Syllepis, founded on species of Lmperata, while Doll, 
Kunth, Grisebach, and others regard it undoubtingly as the same as Paspalum sac- 
charoides. 
32. SACCHARUM. 
Saccharum, Linn. Gen. Plant. n. 73; Benth. et Hook. Gen. Plant. iii. p. 1125. 
A genus of about a dozen species, some of them very closely allied to each other, 
natives of tropical and subtropical regions in the Old World, one of which has long 
been cultivated in America; and one American species. 
1. Saccharum cayennensis, Benth. in Journ. Linn. Soc. xix. p. 66; Hack. in 
Mart. Fl. Bras. ii. 8, p. 253. 
Eriochrysis cayennensis, Beauv. Agrostogy. p. 8, t. 4. fig. 11; H. B. K. Nov. Gen. Sp. i. p. 183; 
Griseb. Fl. Brit. W. Ind. p. 560; Fourn. Mex. Pl. Enum., Gram. p. 51. 
Sovran Muxtco, Orizaba (Botteri), Mexico? (Liebmann).—CoLomBIA and VENEZUELA to 
GUIANA and Brazizt, and in Trintpap. Hb. Kew. 
