CoLr. MONOtClA TRIANDUIA. 571 



side ol tlie male pedicel there is a compressed clubbed pedi- 

 cel, each elevating- the rudiment of a corollet; between them 

 and the involucre is the small valvelet of what 1 call the 

 calyx. Calyx common to the above mentioned clubbed pedi- 

 cels and the proper female flowers, tvvo-valved ; the large one 

 ovate, pointed, embracing entirely the prop(!r flower. Corol 

 in general six-valved, four on one side, and two on the other, 

 diminishing in size gradually. Germ ovate. Sfyfe two-cleft, 

 as in the genus. 



4. C. aqnaiica. R. 



Floating and creeping from lifty to one hundred feet. 

 Leaves linear, most acute, >vith hispid margins. Male spikes 

 drooping, many-flowered • floioers three-fold, the middle one 

 pedicelled. /^ema/e coro/ from six to seven- valved. Seeds 

 turbinate. 



A native of the lower parts of Bengal, where it is general- 

 ly found floating on lakes, and along their margins to a ve- 

 ry great extent. 



Roots, beside the original ones there are many issuing from 

 the joints of the old stems. Stems perennial, jointed, round, 

 smooth, filled with pith, about as thick as a man's forefinger, 

 floating on lakes or creeping along their margins to a great 

 extent ; extreme shoots as well as those from the joints arising 

 in an oblique direction to the height of from four to five feet 

 above the surface of the water, and bearing the leaves and 

 flowers. Leaves, the lower ones linear-lanceolate, the su- 

 perior ones ensif'orm, all have long, tapering, very acute 

 points, with the margins hispid, from one to three feet long, 

 and about the middle, where broadest, from an inch to an 

 inch and a half wide. Spikes terminal, and from the exterior 

 axills, peduncled, solitary or in pairs, drooping. Female 

 FLOWERS generally solitary on the base of the male spikes. 

 Involucre turbinate, perforated ; calyx and corol, i. e. glumes, 

 within the involucre, from six to seven- valved, with two abor- 

 tive corollets and their common valve, as in C. yiyantea. 



3 T 2 



