Ischcemum. triandria digynia. 323 



6. I. tenellum. R. 



Creeping near the base. Leaves linear. Spikes paired. Ex- 

 terior valve of the sessile flower truncate, the rest cuspidate, 

 hermaphrodite flower alone awned. 



A weak straggling species. 



Culms weak, creeping and iambus towards the base ; to- 

 wards the heads erect; the thickness of a pigeon's quill; joints 

 bearded. Leaves a little hairy near the base, mouths of the 

 sheaths ligulate, and hairy. Spikes paired, &c. as in the last 

 species. Flowers paired, &c. Calyx of the sessile flowers 

 two-valved, two-flowered ; exterior valve retuse and border- 

 ed ; inner valve ending in an awled point. Floivers two, one 

 hermaphrodite with a two-valved corol, the exterior of which 

 ends in an arista, the other is male with an awnless two-valv- 

 ed corol. Calyx, of the pedicelled flower both valves alike, 

 and ending in an awled point; it contains a single flower, 

 Which is sometimes hermaphrodite, and sometimes male, with 

 the rudiment only of the second flower. 



7. I. repens. R. 



Creeping. Leaves short and acute. Spikes paired. Flow- 

 ers all polygamous and awnless ; glumes of the calyces smooth 

 and cuspidate. Rachis smooth. 



A native of Pulo Pinang. 



Culms creeping, flexuose, smooth, from one to two feet long. 

 Leaves bifarious, sword-shaped, short, rigid. Sheaths as 

 lono- as the joints, a little hairy, with a stipulary process at 

 the mouth. Spikes terminal, paired, uniting a little above 

 what seems to be their base. Rachis jointed, three-sided, 

 smooth. Flowers about six pair, one of each pair sessile, the 

 other peduncled, both the pedicelled and sessile one consist- 

 ing of a two-flowered, two-valved, rigid, acute, smooth calyx. 

 Flowers polygamous, one hermaphrodite, the other male, 

 both awnless, each floret having a corol of two acute valves. 



U2 



