74 ME. G. BETTTHAM ON GEAMINEiE. 



pedicellation of tte spikelets hare induced the proposal of distinct 

 genera for most of the species, and several of them have been 

 adopted by Andersson in a monograph most carefully worked up 

 in as far as the materials at his command admitted, but in which, 

 for want of access to a sufiBciently rich library, he is much mis- 

 taken as to several of the synonyms quoted. These proposed 

 genera are : — 1. Aristaria, Jungh., for A. frondosa, Br. {A. Jung- 

 huhniana, Nees), which forms the section Heterelytron of Anders- 

 son, but not Junghuhn's genus of that name. 2. Perohachne, 

 Presl, is A. arundinacea, Eoxb., forming Andersson's subsection 

 ChrysantTiistiria. 3. Andersson's subsection -BMaM^Ajs^mfl for the 

 common A. ciliata, Linn., and its immediate allies, to which some 

 botanists would restrict the genus. Andersson distinguishes twelve 

 species, adding at the same time that they might well all be re- 

 duced to varieties of a single widely-spread species. 4. Andro- 

 scepia, Brongn. {Heterelytron, Jungh.), was founded originally on 

 the A. gigantea, Cav., but became a very unnatural group when 

 made to include A. {Androscepia) anathera, Anders., which very 

 closely resembles A. {Euanthistiria) minuta, Anders., and a variety 

 arinata, Anders., of A. gigantea, which is much nearer to the A. 

 (FeroiacJine) arundinacea. 5. Iseilema, Anders., containing two 

 East-Indian and one Australian species, and 6. Exofheca, Anders., 

 comprising A. abyssinica, Hochst., from tropical Africa, and A. 

 fasciculata, Thw., from Ceylon, have each a peculiar habit and 

 characters, sufficient to maintain them as sections. 7. Germainia, 

 Balansa, has, perhaps, two closely allied species — A. caudata, Nees, 

 from Ehasiya and China, and the typical A. capitata fron Saigou; 

 the latter, however, which I only know from Balansa's figure and 

 description, is exactly like the Chinese plant, except that there 

 appear to be rather more spikelets in the cluster. 



26. Apltjda, Linn., is now universally recognized as a distinct 

 and natural genus, limited to the two tropical-Asiatic species ori- 

 ginally assigned to it by Linnseiis, though his character was even 

 then very imperfect, and rendered still more so by the subsequent 

 addition of the very different American Zeugites, which Schreber 

 afterwards restored as an independent genus. Beauvois, however, 

 threw every thing into confusion; for it is evident from his figures 

 that his Diectomis is A. aristata, Linn., and his Galamina is A, 

 mutica, Linn,, though in drawing up his character for the latter 

 he combined it with some species of Anthistiria. Beauvois's 

 Apluda is certainly different, probably a Chrysopogon, 



