GRAMINE. 485 
plant is very distinct from everything else in the genus at Kew, and is probably an 
undescribed species. Fournier (Sertum Nicaraguense, in Bull. Soc. Bot. France, xxvii. 
p. 293) enumerates only one species of Jsachne, namely I. disperma. 
5. PANICUM. 
Panicum, Linn. Gen. Plant. n. 76; Benth. et Hook. Gen. Plant. ii. p. 1100. 
One of the largest genera of grasses, comprising upwards of 250 species, which are 
generally diffused in tropical and subtropical regions, but rare in the temperate zones, 
especially the northern. The determinations of Munro, in the Kew Herbarium, and of 
Fournier in his ‘ Mexicanarum Plantarum Enumeratio,’ do not always agree, and many 
of the forms regarded as distinct new species by the latter are referred to previously 
described species by the former, so that, although some of Fournier’s new species are 
retained here for want of means of determining what they are, the plants may be 
actually included, in some instances, under other species. 
1. Panicum acuminatum, Swartz, Prodr. Fl. Ind. Occ. p. 23; Griseb. Fl. Brit. 
W. Ind. p. 553 (var. Panici dichotomi); Ch. et Schl. in Linnea, vi. p. 34; Fourn. 
Mex. Pl. Enum., Gram. p. 21. 
CanaDa southward.—Norta Mexico, San Luis Potosi (Virlet d’ Aoust) ; Soura Mexico, 
Jalapa (Schiede & Deppe), Mirador (Schaffner), Totutla, Hacienda de Jovo (Liebmann), 
Orizaba (Botteri)— West Inpizs. Hb. Kew. 
We follow Fournier in keeping P. nitidum, Lam., distinct from P. dichotomum, Linn., 
which is the name generally adopted for the North-American forms of this species. 
2. Panicum ambitiosum, Fourn. Mex. Pl. Enum., Gram. p. 30. 
Milium sparsum, Mill. Dict. n. 2? 
SourH Mexico, Orizaba (Thomas), Vera Cruz (herb. Uzac). 
Only known from Fournier’s description ; it is placed next to P. virgatum, Linn. 
3. Panicum arundinarig, Trin. ex Fourn. Mex. Pl. Enum., Gram. p. 25. 
Norta Mexico, San Luis Potosi ( Virle¢ d’Aoust) ; Sour Mxxico, Mirador (Liebmann), 
Orizaba (Miller), Cordova (Schaffner). 
4, Panicum ascendens, H.B.K. Nov. Gen. et Sp. i. p. 97; Kunth, Enum. Pl. 
i. p. 83; Fourn. Mex. Pl. Enum., Gram. p. 17. 
Panicum villiferum, Nees in Linnea, xix. p. 687? ex Fourn. 
South Mexico, between Zelayo and Queretaro (Humboldt & Bonpland), without 
locality (Liebmann).—Co.LomBiA to Perv, and in Cusa. 
5. Panicum aturense, H.B.K. Nov. Gen. et Sp. i. p. 103, t. 33; Kunth, Enum. 
Pl. i. p. 123; Rupr. in Bull. Acad. Brux. ix. (reprint, p. 13) ; Fourn. Mex. Pl. Enum., 
Gram. p. 23. 
Panicum blepharophorum, Presl, Reliq. Heenk. i. p. 312. 
