Paniacm.} Grammecs. 147 



22. P. interruptum, Willd. Sp. PL i. 341 (1797). 



Thw. Enum. 361. Moon, Cat. 7. C. P. 910. 

 Fl. B. Ind. vii. 40. 



Perennial, quite glabrous; stem 2-6 ft., ascending from a 

 very stout, creeping and rooting or floating rootstock, lower 

 internodes 2-4 in., sometimes as thick as the thumb, spongy 

 within, nodes emitting fascicles of long stout roots clothed 

 with root-hairs, upper internodes very long, slender, strict; 

 1. 6-12 by \-\ in., linear, finely acuminate, soft, flat, base 

 rounded, hardly contracted, margins smooth or scaberulous, 

 sheaths 2-4 in., margins smooth, ligule short, broad, mem- 

 branous; panicle 6-12 in. by \-\ in. diam., cylindric, inter- 

 rupted below, rhachis stout, strict, channelled ; spikelets \-\ in., 

 densely crowded in small fascicles, subsessile or shortly pedi- 

 celled, spreading, narrowly ovoid, acute, terete; glumes mem- 

 branous, I minute, orbicular, hyaline, shortly 3-5-veined, 

 II and III subequal, ovate-oblong, subacute, herbaceous, very 

 strongly veined, II 9-veined, III 7-veined, paleate, male, tip 

 with hyaline margins, palea hyaline; anth. long, narrow; IV 

 shorter than III, ovoid-oblong, subacute, thinly coriaceous, 

 ivory white, polished, dorsally convex, palea as large as the 

 glume; grain obovoid-oblong, plano-convex, pale brown, 

 apiculate, embryo large, orbicular. 



Marshes in the hotter parts of the Island; often floating and forming 

 small islands (Ferguson). 



Tropical Asia and Africa. 



Habit and thin not hardening glume IV of P. Myurus, but very 

 different in the form and venation of the glumes. 



23. F. indicum, Linn. Mant. ii. 184 (1771). 

 Thw. Enum. 361. Moon, Cat. 8. C. P. 885, 908. 



Fl. B. Ind. vii. 41. Trin. Sp. Gram. Ic. t. 197; t. 334 (P. angustum). 



Annual, tufted, glabrous; stem4in.-2ft, erect, or ascending, 

 from a geniculate base, leafy chiefly towards the base, upper 

 internodes long, uppermost usually very slender and naked ; 

 1. 2-4 in. by iV~i in., erect, linear, acuminate, flat, base narrow 

 or rounded, margins scaberulous, lower sheaths short, upper 

 long, margins naked, ligule o; panicle ^-3 in. long, spiciform, 

 cylindric, erect, rhachis slender, angular; spikelets t V~to in. long, 

 densely crowded, subsessile, pedicel rarely half as long as the 

 glumes, erect or spreading, ovoid, acute, more or less gibbous 

 and decurved, glabrous or hispidulous; glumes very strongly 

 veined, I about half as long as III, ovate, acute, 3-5-veined, 

 margins hyaline, II ovate, incurved, dorsally gibbous, obtuse 

 or subacute, 7-9-veined, III as long as II or rather shorter, 

 oblong, obtuse, 7-9-veined, paleate, empty, palea small, IV 

 much the shortest, oblong or ovoid, acuminate, acute or sub- 



