GRAMINEZ. 515 
Tribe IV. TRISTEGINEZ. 
Tristeginee, Benth. et Hook. Gen. Plant. iii. pp. 1075 et 1080. 
This tribe, like the last, is thinly scattered over Asia, Africa, America, and Australia, 
but it is apparently unrepresented in Europe; at least, as circumscribed in the ‘ Genera 
Plantarum.’ In the ‘Flora Australiensis’ (vii. p. 546), and in a preliminary review of 
the Graminee (Journ. Linn. Soc. xix. p. 58), Bentham included in it the almost 
ubiquitous genus Polypogon, which he finally referred to the Agrostidee. As now 
constituted the tribe comprises twelve genera, which, with the exception of Arundinella 
and Garnotia, contains only from one to three species each. Of the last-named genus 
about eight species are known. 
24, ARUNDINELLA. 
Arundinella, Raddi, Agrostogr. Bras. p. 36, t. 1. fig. 3; Benth. et Hook. Gen. Plant. iii. p. 1118. 
There are about twenty-four species of this genus, widely diffused in the tropical 
regions, though most numerous in Asia. Fournier enumerates seven Mexican species, 
but we can only distinguish two, or at most three, among the specimens in the Kew 
Herbarium. Still the material is insufficient to decide how many species there are from 
our standpoint. 
1. Arundinella deppeana, Nees in Bonplandia, 1855, p. 84, et in Seem. Bot. 
Voy. ‘ Herald, p. 224, vix Fourn. Mex. Pl. Enum., Gram. p. 54. 
Arundinella auletica, Rupr. in Bull. Acad. Brux. ix. (reprint, p. 16, nil nisi nomen); Fourn. Mex. 
Pl. Enum., Gram. p. 54 (descriptio). 
Arundinella latifolia et A. scoparia, Fourn. 1. c. pp. 54 et 55. 
Thysanachne scoparia, Presl, Symb. Bot. p. 12, t. 6. et Relig. Hank. i. p. 253. 
SoutH Mexico, Vera Cruz to Orizaba (Miiller, 2129; Botteri), Mirador (Liebmann ;. 
Linden, 282), Cordillera of Vera Cruz at 3000 feet (Galeotti, 5679), valley of Cordova 
(Bourgeau, 1660, in part); Panama, near the city of Panama (Seemann, 228), Paraiso 
(S. Hayes, 608). Hb. Kew. 
Doll (Mart. Fl. Bras. ii. 2, p. 229) refers Arundinella auletica and Thysanachne 
scoparia to Arundinella martinicensis, Trin., and he is probably right. Fournier refers. 
the A. martinicensis of Grisebach, Cat. Cub. Pl. p. 234, to A. auletica; and A. phrag- 
mitotdes, Griseb. 1. c., is perhaps the same as A. deppeana, Nees. 
2. Arundinella pallida, Nees, Agrostol. Bras. p. 465; Déll in Mart. Fl. Bras, 
ii, 2, p. 298, sub A. brasiliensis (t. 38); Fourn. Mex. Pl. Enum., Gram. p. 53. 
Ischemum pallidum, Kunth, Enum. Pl. i. p. 515. . 
South Mexico, Mirador and Huatusco (Liebmann); Panama (Seemann). Hb. Kew. 
Arundinella robusta, Fourn. 1. c., may be a luxuriant state of this species (Bourgeau, 
1660, in part), and 2223 Bourgeau, as to the Kew specimen, is the same ; yet Fournier 
refers it to A. deppeana. Fournier also refers some Mexican specimens collected by 
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