198 Graminece. [Dimeria. 



5. B>. fuscescens, Trin. in Mem. Acad. Petersb. Ser. VI. ii. 335. 



(i833). 



Trim. Cat. Ceyl. PI. 107. D. fuscescens, /3 zeylamca, Hack. Monogiv 

 Androp. 85. D. ornithopoda, var. /3, Thw. Enum, 369. C. P. 3256. 



Fl. 15. Ind. vi. 105. 



Perennial; stems 12-18 in., slender or stout, densely 

 tufted, erect, leafy chiefly at the base, internodes few, upper 

 very slender, nodes glabrous ; 1. crowded towards the base of 

 the stem, 2-3 by \-\ in., strict, erect, narrowly oblanceolate, 

 finely acuminate, rigid, glabrous or hairy towards base, 

 margins scaberulous, midrib slender, sheaths short, glabrous,, 

 terete or lower compressed, mouth not auricled, ligule broad,, 

 short, ciliolate ; spikes 2-3-nate, 2-3 in. long, strict, divergent, 

 lax-fid., glabrous, dark purplish, rhachis slender, rigid,, 

 unequally trigonous, smooth, internodes half as long as the 

 spikelets or longer ; spikelets shortly pedicelled, \- jV in. long,, 

 callus minute, shortly bearded, pedicels clavate, glumes I and 



II subequal, rigid, scaberulous, cuspidately acuminate, keels 

 of I t scaberulous, II narrowly oblong, wing as broad as the 

 glume, scaberulous, margins membranous, obscurely ciliate,. 



III obovate-lanceolate, 1 -veined, tip rounded, ciliate, IV 

 narrowly oblong, tip bifid, awn about \ in., palea minute,, 

 lanceolate, ciliate ; lodicules very minute, cuneate ; anth. T V in. 



Var. /3, robust a , Hook.f. 



Stem taller, much stouter, branching and leafy upwards. 



Central Province. Horton Plains, and Nuwara Eliya, alt. 6000-7000 ft. 

 Var. j8, Knuckles (Ferguson). 



Nepal, the Khasia Hills, Tenasserim, and the Concan. 



According to Hackel, the type of D. fuscescens is Wallich's n. 8841, 

 in which the spikelets are dense-fid., the rhachis of the spike scabrous 

 or scaberulous, and the keel of glume II not winged, but with a short 

 scarious ciliate margin below the tip. The Ceylon plant he regards as 

 a variety, /3 seylanica, with longer spikelets and the keel of glume II 

 rather broadly winged. Of this last he cites no specimen or number of 

 Thwaites, but gives as a habitat Dambulla, Trimen, of which there are: 

 no specimens in Herb. Peraden. 



6. D. Trimeni, Hook.f. 



D. ornithopoda, var. y, Trim. MSS. 



Perennial ; stems tufted, erect or ascending from a creep- 

 ing rootstock, i|-2 ft. high, rather stout below, branched, 

 leafy, upper internodes slender, nodes bearded ; 1. 6-8 by 

 |— ^ in., linear or very narrowly oblanceolate, rigid, narrowed 

 from much above the middle to the acuminate tip and very 

 narrow base, rigid, more or less villously hairy or woolly on< 

 both surfaces, margins scaberulous, midrib stout, sheaths 

 woolly, mouth not auricled, ligule broadly rounded, ciliolate ; 



