Jsch<zmum^\ 



Graminece. 



211 



I. SEMISAGITTATUM. 

 I. COMMUTATUM. 



sally at the sinus, very slender, smooth, or nearly so, column 

 brown twisted, palea narrow, hyaline ; lodicules cuneate or 

 •quadrate ; styles usually and stigmas short ; pedicelled 

 spikelets like or unlike the sessile, pedicel half as long as the 

 sessile spikelet or shorter, glume I, often dimidiate-ovate, flat- 

 tened and broadly winged, glume IV usually oblong, obtuse, 

 ■or minutely 2-lobed, awnless, rarely as in the sessile spikelet. 

 — Sp. about 40 ; 27 in Fl. B. Ind. 

 See remarks under Pollinia. 



Sect. I. Euischaemum. — Spikes 2 or more, 

 rarely solitary, veins of glume I obscure. 

 Margins of glume I of sessile spikelet narrowly 

 inflexed or incurved from base to top. 

 L. rounded at the base. 



Glume I of sessile spikelet with nodulose 



margins . . . . . . I. I. ARISTATUM. 



Glume 1 closely transversely ridged . 2. I. RUGOSUM. 

 L. hastate sagittate or cordate at the base. 

 Glume I of sessile spikelet transversely 

 ridged ...... 3. 



Glume 1 of sessile spikelet smooth . . 4. 

 Margins of glume I narrowly incurved above, 

 broadly below. 

 Keel of glume II winged above the middle. 



Spikes glabrous 5. I. MUTICUM. 



Spikes more or less villous . . . 6. I. ciliare. 

 Keel of glume 1 1 not winged. 



Stem stout, suberect . . . . 7. I. rivale. 

 Stem slender, creeping below . . . 8. I. TIMORENSE. 

 Sect. II. Sehima.— Spike solitary, glume I of 

 sessile spikelet flat, with strongly raised 

 veins 9. I. laxum. 



1. I. aristatum, Linn. Sp. PI. 1049 (partim) (1753). 

 /. barbatum, Retz. ; Thw. Enum. 364. Moon, Cat. 72. C. P. 700, 

 869, 994. 



Fl. B. Ind. vii. 126. Burm. Fl. Ind. t. 21, f. 8 (bad). 



Perennial; stem 1-4 ft., stout, erect, simple or branched, 

 leafy, glabrous, thickened towards the spikes; 1. 4-10 by 

 \-\ in., linear-lanceolate, acuminate, fiat, glabrous or sparsely 

 hairy, glaucous beneath, narrowed to the acute or cordate 

 sometimes petiolulate base, margins scabrid, midrib slender, 

 veins 3-many pairs, sheaths loose, glabrous, mouth naked, 

 auricled, auricles up to \ in. long, or short, margins mem- 

 branous, ligule membranous ; spikes 1 or 2, up to 6 in. long, 

 erect, stout or slender, fragile, internodes \ as long as the 

 spikelets or shorter, stout, tumid or subclavate, more or less 

 bearded; spikelets \-\ in., sessile and pedicelled pressed 

 closely together, hirsute villous or nearly glabrous, callus very 



