Rottboellia.l CLXXTII. GRAMINBJI. (J. D. Hooker.) 159 



TENASSERIM; Mergui, Griffith, Heifer. 



Habit of R. perforata, but at once distinguished by its greater size, and broad 

 leaves which attain an inch in breadth with the tip finely acuminate, base rather 

 narrowed, margins ciliate below the middle or towards the base only, both surfaces 

 glabrous; sheath with glabrous or ciliate margins. Spikes 2-3 in., long peduncled ; 

 top of peduncle slightly clavate ; joints in., about as long as the spikelets, clavate, 

 quite smooth. Sessile spikelets ovate-oblong, winged at the top, quite smooth or 

 with a few linear impressed pits, margins naked or obscurely ciliate. 



18. R ; g-eminata, Hack, in (Estr. Bot. Zeit. xli. (1891) 48 ; gl. I o 

 sessile spikelets hirsute below with tubercle-based hairs. 



MALAY PENINSULA ; Pahang, Ridley. 



Stems upwards of 2 ft. high, sparingly branched and flowering above; nodes 

 bearded with reflezed hairs. Leaves 12 by |-i in., linear, acuminate, rigidulous ; 

 sheaths appressed, mouths bearded ; ligule short, membranous. Spikes about 2 by 

 in., green, fragile; joints ab@t % i n -> shorter and as broad as the spikelets, clavate, 

 dorsally convex, ventrally and the tops deeply hollowed. Spikelets in., separated 

 by the narrow pedicel of the withering upper spikelets, dimidiate-ovate, glabrous, 

 callus annular ; gl. I coriaceous, acuminate, narrowly winged at the top on each 

 side, margins narrowly inflexed, nerves many very slender, hairs white ; II as loug 

 as I, ovate, subulate-acuminate, keeled, chartaceous ; III shorter, hyaline, ovate, 

 acuminate, empty, nerves 0; IV 1-nerved ; palea like its gl. Description from 

 Hackel ; I have not seen it. 



UNDETERMINABLE SPECIES, 



R. VILLOSA, Poir. Encycl. vi. 313; is, according to Hackel (Afonogr. Androp. 

 313), probably an Ischcemum or Andropngon. 



47. XKANXSURXS, Sw. 



Annual, erect, much branched grasses. Leaves cordate at the base. 

 Spikes terete, solitary, axillary and terminal, peduncles often confluent in 

 a leafy spiciform panicle; racT5is fragile; joints short, deeply excavate, 

 tips with 2 pits. Spikelets 1-2-fld., in dissimilar pairs, one globose, 

 sessile, bisexual ; the other ovate, pedicelled, neuter, pedicel adnate to the 

 joint of the rachis. Sessile spikeUt; glumes 4, 1 hard, globose, foveolate, 

 with an oblong opening opposite the rachis ; II chartaceous, immersed in 

 the cavity of I and filling the opening; III hyaline, empty; IV audits 

 palea hyaline, Lodicules 2, broadly cuneate. Anthers minute. Styles 

 free, stigmas short, exserted from the opening in gl. I. Grain subglobose. 

 Species 2, tropical. 



1. Iff. g-ranularis, Linn.f. Nov. Gram. Gen. 37, f. 7, fig. 4-7; sessile 

 spikelets globose deeply pitted smooth between the pits, gl. II 1-nerved. 

 810. Prodr. Veg. Ind. Occ. 25 (partim), Fl. Ind. Occ. i. 186 ; Gsertn. Fruct. 

 ii. 468, 1. 175; Beauv. Agrost. 119, t. 21, f. 10; Roxb. PL Gorom. ii. 11, 1. 118 ; 

 Kunih Enum. PI. i. 469 ; Hack. Monogr. Androp. "S14 ; Steud. Syn. Gram. 

 Grah. Gat. PL Bomb. 234; Dais. & Gibs. fymb. Fl. 300; Griff'. Notul. iii. 

 101 ; Thw, Enum. PL Zeyl. 364 ; Trim. Gat. CeyL PL 107 ; Duthie Grass. 

 N. W. Ind. 18, Fodd. Grass. N. Ind. 29, t. 46 ; Lisboa in Journ. Bomb. Soc. 

 Nat. Hist. vi. (1891) 196; Benth. FL Austral, vii. 511 ; Miq. Fl. Ind. Bat. 

 iii. 409 ; Grixeb. Fl. Brit. W. Ind. 557 ; Doell. in Mart. Fl. Bras. ii. II. 

 t. 46 ; Wall. Cat. n. 8879 ; Wight Gat. n. 1726. M. polystachya, Beauv. 

 FL Owar. $ Ben. i. 24, t. 14. M. hirta, Herb. Suss, ex Wall. Gat. I. c. 

 Cenchrus gru-nularis, Linn.f. Mant. ii. App. 575. 



