Hygrorhyza^ Graminece. 185 



branches 2-4 ft. high, nodes puberulous ; 1. 6-12 by \- \ in., 

 suberect, acuminate, smooth, margins scaberulous, base 

 narrow, sheath nearly smooth, margins eciliate, ligule oblong 

 or rounded, scarious; panicle 2-4 in. long, peduncled, oblong, 

 laxly branched, rhachis filiform and capillary branches 

 smooth ; spikelets t V~t i n -» secund toward the ends of the 

 branches, erect, sessile or pedicels short ; glume smooth 

 except on the keel and margins. 



Common up to 4000 ft, ascending to Nuwara Eliya (6200 ft.) in a 

 •dwarf form (Ferguson). Spikelets pale green. 

 Trop. Asia, Africa, America, and Australia. 



17. KY6SORHYZA, Nees. 

 A floating glabrous grass, stems rather stout, diffusely 

 branched, rooting at the nodes, branches short, erect, leafy, 

 roots in dense masses, clothed with capillary root-fibres, inter- 

 nodes long or short; 1. oblong, obtuse; infi. a short shortly 

 peduncled panicle as broad as long, with few widely spreading 

 branches, the lower whorled; spikelets few, i in., erect, i-fld., 

 jointed on the pedicels, but tardily deciduous, lanceolate, long- 

 awned, glumes 2, thinly chartaceous, I narrowed into an 

 •erect scaberulous awn about t 4 q in. long, strongly 5-veined, 

 veins scabrid, ciliate, lateral marginal, palea much narrower, 

 3-veined, keeled, keel ciliate; lodicules minute, suborbicular ; 

 stam. 6, .anth. long, very slender; styles free, stigmas feathery, 

 laterally protruded ; grain oblong, narrowed at the base, 

 obtuse, free within the glume and palea. — Monotypic. 



H. aristata, Nees in Edinb. N. Phil. Joum. xv. 380 (1833). CrO- 

 jabba, S. 



Thw. Enum. 356. Leersia aristata, Roxb. Fl. Ind. ii. 308. C. P. 878. 

 Fl. B. Ind. vii. 94 Griff. Ic. PI. Asiat. t. 139, f. 147, and t. 140 

 {Potamochloa Retzii). Rheede, Hort. Mai. x. t. 12. 



Stem a foot long and more, spongy, internodes long or 

 short; 1. i-iij in., rather broadest at the rounded or sub- 

 cordate base, scaberulous above, smooth and glaucous beneath, 

 subcoriaceous, margins nearly smooth, midrib very short, 

 veins very many, slender, sheaths longer than the internodes, 

 smooth, somewhat inflated, margins eciliate, ligule a very 

 narrow membrane; panicle about 2 in. long and broad, 

 triangular, lower branches sometimes deflexed, rhachis and 

 branches slender, stiff, smooth; spikelets very narrow, sessile 

 or pedicelled. 



Hotter parts of the Island, floating in marshes, &c. ; common. 

 Spikelets pale green. 



India, Tonkin. 



