958 rxT.vn. r.i!A"MiXRyT. 



Pedicel of upper spikelet ^ the length of the 

 lower spikelet or more. 



Steins woolly sit the base 4. I. angustifolium. 



Stems not woolly at the base. 



Upper invol.-gliiine of sessile spikelets 

 2-(id, 3-nerved ; lateral nerves peeti- 



iiately ciliate at the apex 5. /. diplo2)ogon. 



Upper invol. -glume of sessile spikelets 

 acuminate, 5-nerved ; lateral nerves 

 anastomosing, not pectinately ciliate . 6. /. pilosiim. 

 Leaves hastate or deeply cordate at the base, petio- 



late 7. I. scmhagUtatum. 



Margins of lower invol. -glume of sessile spikelets broadly 

 incurved below the njiddle. 



Sessile spikelets \ in. long ; callus large, gLibrous ; 



awn 5 in. long 8. I. Lishoa. 



Sessile spikelets J in. long ; callus shtrt, bearded ; 



awn ^ in. long 9. I. ciliare. 



Raceme solitary ; lower invol. -glume of sessile spikelets 

 deeply channelled or depressed along the median line. 



Racemes enclosed in long narrow spathes 10. I. spathijlorum. 



Racemes not enclosed in spathes. 



Lower invol. -glume of sessile sjiikelcts 6-ncrved ; upper 



invol.-ghime"of]jedicellate spikelets shortly awned. 11. /. la.rum. 

 Lower invol.-glume of sessile spikelets 2-nerTcd ; upper 



invol.-glume of pedicellate spikelets not awned 12. I. sulcatum. 



] . Ischsemum aristatum, Linn. Sp. PL (1753) p. 1049. Perennial ; 

 stems 1-4 ft, high, stout, erect or decumbent at the base, simple or 

 branclied above, leafy, glabrous, thickened at the top below the spikes. 

 Leaves 4-10 by 5-I in., linear-lanceolate, finely acuminate, glabrous or 

 sparsely hairy, glaucous beneath, narrowed to the acute or subcordate 

 base, with scabrid margins ; sheaths loose, glabrous, the mouth naked, 

 auricled ; liguh' membranous. Eacemes 1 or 2, stout or slender, 1-4 in. 

 long. Spikelets reaching 1 in. long, a sessile and a pedicellate closely 

 pressed together ; callus of sessile spikelets broad, thick, -^ in, long. 

 SessiJe spil-eh'ts : lower invol.-glume I in. long, broadly oblong, cartila- 

 ginous and often purplish below the middle, with 2-4 marginal nodules 

 on each edge transversely connected by sliallow ridges, thinner above 

 the middle, with green anastomosing veins, tip obtuse or 2-dentate, 

 margins narrowly incurved, ciliolate ; upper invol.-glume lanceolate, 

 acuminate, 1-nerved, with smooth rounded keel ; lower floral glume 

 ovate-lanceolate, acuminate, 1-nerved, membranous, male or 2-sexual, 

 w itii an oblong palea ; upper floral glume female, cleft to or below the 

 middle into lanceolate acuminate lobes, with a brownish-red awn | in. 

 oi' more long at the sinus, twisted below, straight above ; jialea linear- 

 ol)l()ng, Pcdicelhte spikelets as long as the sessile, inarticulate 011 the 

 very tliick amorphous pedicel, which is densely silky-hairy at the base ; 

 lower invol.-glume gibbous or scimitar-shaped, acute, coriaceous, tinged 

 with purple, \\ilh a ciliolate semicircular wing; upj)er invol.-glume and 

 lower floral glume as in the sessile spikelets : up])er floral glume hyaline, 

 with a mucro or very short awn. Y\. B. I. v, 7, p. 120; Grab. Cat. 

 p. 239 : ])alz, & Gibs. p. 30(i ; Trim, Fl. Cevl. v, 5, p. 211 ; Woodr, in 

 .rourn. Bomb. Nat. v. 13 (1901) p. 436; Prain, Beng. PL p. 1195.— 

 Flfiwers : Oct.-Dec. Vbhn. Bherda ; Guj. 



KoNKAN : Matunga near Bombay, Woodrow, 4! S. M. CorNTRv: Eelganin. It'ifchie, 

 5^12 2!- DisTiiin. I'lains and l.iver hills of India ; Ci'vlon. Chiiia, ^lalaya. 



