DimeriaJ] CLXXIII. GKAMINE^E. (J. D. Hooker.) 105 



III oblong. D. ornithopoda, Tliw. Enum. 369. Pterygostachyum Leh- 

 manni, Nees ex Steud. Norn. Ed. II. ii. 412, Syn. Gram. 413. 



CEYLON, Macrae, Walker, Thwaites. 



Annual, branched, 8-10 in. high. Leaves erect, flat, acuminate. 



Var. a; glabrous, rachis of spike ciliate, spikelets awned. (C.P. 952.) 



Var. (3 ; rachis of spike scaberulous, spikelets not awned. (C.P. 955.) 



8. D. pubescens, Hack. Monogr. Androp. 83 ; spikes stout spreading, 

 margins of broad straight rachis ciliate, spikelets | in. sessile silky, gl. I 

 and II shortly acuminate, I narrowly linear with membranous margins 

 longer than III. D. ornithopoda, var. y, Thw. Enum. PL Zeyl. 369. 



CEFLON, Gardner; Pasdoon Corle, Thwaites (C.P. 956). 



Perennial, branched from the base, glabrous to villously hairy. Racemes 2-2 in., 

 often solitary and inclined ; rachis flat, ^ in. broad or less. Spikelets densely im- 

 bricate ; gl. I and II silky all over; awn twice as long as the spikelet or longer. 



9. D. fuscescens, Trin. in Mem. Acad. Petersb. Ser. YI. ii. (1833) 335 ; 

 spikes stout spreading, rachis undulate margins smooth or scaberulous, 

 spikelets |- in. sessile, callus minute or 0, gl. I and II acute or 

 acuminate, I narrowly linear much longer than III, margins of II 

 broadly membranous. Hack. Monogr. Androp. 84 ; Trim. Cat. Ceyl. PI. 

 107; Lisboa in Journ. Bomb. Nat. 'Hist. Soc. vi. (1891) 189. D. ornitho- 

 poda, var. /3, Thw. Enum. PI. Zeyl. 369. Dimeria, Wall. Gat. n. 8841. , 



NEPAL, Wallich. KHASIA HILLS, alt. 4-5000 ft., Griffith, &c. TENASSEKIM, 

 Heifer. The CONCAN, Lisboa. CEYLON, G-ardner, Thwaites (C.P. 3256). 



Perennial, 2-3 ft. high, stout, simple or branched. Leaves glabrous or hairy. 

 Spikes 2-4 in. ; rachis compressed trigonous. Spikelets reddish-brown ; awn twice as 

 long as the gls. The Tenasserim specimens are small and in a poor state. 



10. D. alata, Hook. f. \ spikes 2-3 rather stout, spikelets T ^ in. sessile 

 glabrous callus naked, gl. I scaberulous, II dimidiate-ovate keel broadly 

 winged, III nearly as long as II, awn 0. D. ornithopoda d mutica, Thw. 

 (in part). 



CEYLON, Thwaites (O.P. 955 of 1864). 



Annual. Stems 6-18 in., tufted, slender, erect. Leaves, 6-12 by ^- in., erect, 

 strict, narrowed to the base, and sheaths hirsute with long spreading hairs. Spikes 

 3 in., strict, spreading ; rachis in., stout, straight, margins scaberulous. Gl. I 

 divaricate ; II appressed to the rachis, broadly hyaline ; wing opaque, strongly 

 ciliate; III oblong, ciliate, 1 - nerved ; IV obovate-oblong, ciliate. The small 

 glabrous spikelets and broadly winged gl. II distinguish this species from D. 

 fuscescens. 



*** Spikes 4-10 (rarely 3) digitate or fascicled. 



11. D. gracilis, Nees ex Steud. Syn. Gram. 413 ; leaves not con- 

 tracted above the sheath, spikes 3-10 long slender flexuous quite glabrous, 

 rachis filiform subtrigonous, spikelets ^-\ in., pedicels long slender 

 glabrous, callus bearded. Hack. M^onogrt Androp. 88 ; Lisboa in Journ. 

 Bomb. Nat. Hist. Soc. vi. (1891) 190. D. laxiuscula, Thw. ex Trim, in 

 Journ. Bot. xxiii. (1885), 272, Trim. Cat. Ceyl. PI. 107. 



The CONCAN, Law; on the Ghats, Lisboa. CEYLON, Macrae, Thwaites, &c. 

 (C.P. 3863). 



Perennial, 1-2 ft. high, stout or slender. Spikes 1^-3 in., pale red-brown ; gl. I 

 and II, lanceolate, ciliate ; I scabrid above the middle or all over ; II with narrAvly 

 membranous margins ; awn twice as long as the spikelet. 



12. D. leptorhachis, Hack. Monogr. Androp. 89 ; leaves contracted 



