602 



with long silky hairs : glumes 2, aoutish, keeled, shorter than the 

 flo-wers, membranaceous, unequal, upper one larger: valves 2, 

 membranaceous, lower one very long, narrow-subulate, upper 

 2-keeled : stamens 3 : ovary glabrous : styles elongated : stigmas 

 plumose, hairs thickish, simple, 2-cleft or branched: scales 2, 

 glabrous : caryopsis free. 



(1) P. KoxBTTEGHrr. fKunth.J 



Ident. Kunth ex Nees N. Act. H". C. 173. 

 Arundo Earka, Roxb. I. e. 347. 



Spec. Chae. Culm branched, leafy : leaves lanceolate, much 

 attenuated, glabrous above, beneath and at the margin scabrous : 

 panicle large, lax, rays and raylets slender, very glabrous : spike- 

 lets 3 — 5-flowered : glumes oblong-lanceolate, acutish or obtuse, 

 lower one twice shorter than the upper glume : lower valve of the 

 lower male floret linear-attenuated; equalling the upper hermaph- 

 rodite and subulate florets. 



Peninsula. Bengal, on banks of rivulets and lakes. 



GENUS XXIII. AMPHIDONAX. 



Trlsiiidrlit Digynia. Sex : Spst .■ 



GrEN. Chae. Panicle: spikelets 2 — 3-flowered, twin, hetero- 

 gamous or homogamous, polygamo-monoecious, lower ones of the 

 rays all males, of the . upper ones either one of each pair or both 

 female : glumes two, keeled, 1 -nerved, nearly equal, shorter than 

 the florets or equalling them, spreading, upper one larger : florets 

 conforming, sessile, opposite, when in threes more separated, 

 2-valved: lower valve lanceolate, long-acuminate, subulate, con- 

 volute, hirsute below, 5 — 7 -nerved, membranaceous, upper shorter, 

 lanceolate, obtuse, bidenticulate, 2-nerved at either side, hirsute at 

 the base : scales membranaceous, emarginate-obcordate, or repand 

 at the apex, cuneate at the base : filaments short, anthers long 

 linear, yellowish : vestiges of a pistil in the males conspicuous, of 

 stamens in the females scarcely any, no organs in tiie neuter 

 spikelets : ovary lanceolate, compressed, glabrous : styles slender, 

 thickened at the base : stigmas ovate, thick, tomentosely brush- 

 shaped : caryopsis free. 



(1) A. Heynh. (Neis.) 

 Ident. Nees Ms. — Steudell. c. p. 197. 



