ME. a. BENTHAM ON GRAMINEJS. 67 



P. aurea, Bentli. (the original genus JSulalia, Kunth), P. articu- 

 lata, Trin. {Pogonatherum contortum, Brongn.), P. eriopoda, Hance 

 {Spodiopogon angustif alius, Trin.), P. longisetus {EriantJms lon- 

 gisetus, Anders.), P. versicolor {Erianthus versicolor , Nees), P.fili- 

 folius (Urianthus filifolius, Nees), and a few others. 2. Lepta- 

 therum, with slender spike-like branches, of which the hairs are 

 few or short, so as to appear sometimes quite glabrous ; this 

 section includes P. glabrata, Trin. (Hulalia glabrata, Brongn.), 

 P. nuda, Trin. (P. imberlis, Nees), P. Willdenowianuni (the genus 

 Microstegium, Nees, P. lancea, Nees, published also by Nees as 

 his genus Leptatherum, and probably also Steudel's Ifemastachys). 

 Sprengel's Pollinia would have had the right of priority over 

 Tririius's ; but that proved a farrago made up of a few heteroge- 

 nous species of Andropogon, Ghrysopogon, and Pollinia. 



7. PoGONATHEETTM, Beauv. {HomopUtis, Trin.), is a single tro- 

 pical and subtropical Asiatic species, very well marked by its 

 slender, much branched habit, the single spikes, and the slender 

 awns arising as well from the second empty glume aa from the 

 flowering one. 



The ArthraxecB, or second group of Andropogonese, consist of 

 three genera, which have the inflorescence of Pollinia ; but the 

 second spikelet of each pair is generally reduced to a bare stipes, 

 or is even quite deficient, bringing a few species very near to the 

 Zoysiese, differing chiefly in their subdigitate spikes, whilst a few 

 others, in which the spikes are single, have the rudiment of the 

 second spikelet of true Andropogonese. 



8. Apocopis, Nees (Amilyachyrum, Hochst.), has iive or six 

 species from East India or the Malayan archipelago, characterized 

 by the very broad truncate outer glume enclosing the rest of the 

 spikelet. Among the species A. Boyleanus, IN'ees {IsoJimmtim 

 paleacewm, Trin., Andropogon paleaceum and A. liimalayensis, 

 Steud.), is remarkable for the awn often (but not always) reduced 

 to a small fine point, or even entirely wanting ; and A, tridewtata 

 {Andropogon tridentatus, Eoyle) has, on the contrary, a very long 

 awn, and the young spikes are usually enclosed in a large spathe- 

 like bract. 



9. DiMEEiA, E. Br. (ITaplachne, Presl, Didaciylon, Zoll, and 

 Mor., PsilostacJiys, Steud., PterygostacTiyv/m, Nees), about ten 

 species from the Indo-Australian region, has very slender spikes, 

 the lower empty glumes very narrow and rather rigid, and usually, 

 if not always, only two stamens. 



