Ischamum. triandria digynia. 321 



transversely rugose ; hermaphrodite floret of the sessile flower 

 awned. 



A native of newly formed pasture land in Bengal. It is a 

 rare grass, appearing about the close of the rains. 



Culms ramous, resting- on the ground near the base, and 

 there striking root at the joints, the sub-erect portion from 

 twelve to eighteen inches, very delicate, firm, and smooth. 

 Leaves short, broad-ensiform, or rather ovate-lanceolate, with 

 a cordate base, and one of the lobes generally projecting con- 

 siderably beyond the culm ; margins slightly hispid, length 

 one and a half or two inches. Spikes two, terminal, sub-secund, 

 an inch and a half long. Rachis jointed, scarcely flexuose, 

 three-sided ; angle* hairy. Floicers in pairs, one sessile, the 

 other sub-sessile, both with their base bearded. Calyces of 

 both flowers almost alike, two-flowered, two-valved ; exterior 

 valvelets obliquely-lanceolate and rather obtuse, the lower 

 gibbous half transversely rugose, as in 1. rngosum, upper 

 portions striated lengthways; margins of the lower rugose 

 portion notched ; of the upper striated part ciliate ; inner boat- 

 shaped in both, one floret is male, the other hermaphrodite. 

 Corol; ylnmes of each floret two-valved ; the exterior valvelet 

 of the hermaphrodite floret bifid, with a long arista in the 

 fork. 



Obs. It ought to be compared with I. harbatum. 



4. I. conjugatum. R. 



Partly creeping. Leaves short, acute, with broad cordate 

 base. Spikes conjugate, seemingly united. Flowers paired, 

 with the exterior valves of both calyces even, and very wool- 

 ly ; the sessile one hermaphrodite, awned. 



A native of pasture land in the vicinity of Calcutta, ap- 

 pearing in the cool season. 



Culms very ramous, creeping near the base,filiform, smooth, 



length from six to eighteen inches, generally purplish. Leaves 



with broad cordate base, from thence tapering to a fine point, 



sheaths smooth. Spikes conjugate on a slender, clavate, pur- 



vol. i. u 



