jlrtkraxon.] Graminece. 223 



obovate or obcordate, chartaceous below, membranous above, 



more or less villous with pale brown or yellow hairs, 7-9- 



veined below the apex, margins incurved at the base only, 



II as long as I, much narrower, membranous, oblong-ovate, 



truncate, 3-veined, sides broadly incurved, III and its hyaline 



palea oblong, tips broadly truncate and ciliolate, male or 



neuter, IV bisexual, linear, 2-toothed, i-veined, hyaline, 



awned, awn short, very slender, twisted, palea half as long as 



the glume, quadrately oblong, veinless, truncate, tip ciliolate; 



lodicules o; anth. linear; ov. narrow, stigmas slender, exserted 



at the tip of the spikelet ; grain very small, narrowly oblong, 



embryo very large. — Sp. 3, all in Fl. B. Ind. 



A. Wig-htii, Nees ex Steud. Syn. Gram. 377 (1854). 

 Thw. Enum. 365. 

 Fl. B. Ind. vii. 142. 



Annual ; stems 6-24 in., densely tufted, erect or ascending, 

 simple or branched, leafy, glabrous ; 1. 2-4 by xo~§- in-, narrowly 

 linear-lanceolate, acuminate, glabrous ciliate or sparsely hairy, 

 margins scaberulous, midrib and veins slender, sheaths gla- 

 brous or hairy, of upper subventricose, mouth not auricled, 

 ligule membranous, lacerate ; spikelets -|— i in. ; glume I dorsally 

 convex, more or less villous or villous and tomentose, awn of 

 IV |-f in., pubescent, column twisted ; anth. yo m - l° n g; 

 pedicel of absent spikelet shorter than the sessile ; grain -oV in. 



There are two forms or varieties of this plant in Ceylon : — ■ 



a, g-enuinus, Hack. Mo?iogr. Androp. 193. C. P. 400. 



Spikelets A in. long, glume I dorsally villous below, puberulous above, 

 tip rounded or retuse, ciliolate. 



(3, mang-alurensis, Hack. I. c. C. P. 3959. 



Glume I obcordate, dorsally villous below, tomentose above, tip ciliate 

 with long hairs. A. Beckettii, Thw. ex Trim. Cat. Ceyl. PI. 107. 



Var. a, Central Prov., alt. 3000-4000 ft. Galagama (Thwaites), Kaloo- 

 pahana, Colombo (Ferguson). Var. fl, Dambulla. Jaffna district, Punakar 

 and Pallavarayankaddu (Trimen). 



Central India, the Deccan Peninsula, Burma, China. 



I find no difference in the length of the awns in the two varieties. 



37. ARTHBAXON, Beauv. 

 Annual or perennial slender grasses ; stem decumbent, 

 creeping and branching below; 1. short, broad, base cordate, 

 sheaths shorter than the internodes; infl. of binate digitate 

 or fascicled spikes, rhachis very slender, articulate, fragile; 

 spikelets i-fld., secund, . sessile, solitary or with an imperfect 

 pedicelled, laterally compressed, deciduous with the internode, 

 callus bearded; glumes 4, I lanceolate or linear-lanceolate, 



