Carwography. 287 
species is nearly related to the preceding; but the differ- 
ence in the manner of growth, colour, and roughness, is great 
and constant; and to the eve their appearance is very di- 
verse. 
68. C. aquatilis. Wahl. 
Pers. no. 193, Wahl. no. 135. Rees’ Cyc. no. 175. 
Schk. Car. II. p. 29. 
Am. Journ. Vol. X. tab. E. fig. 16. 
Spicis staminiferis pluribus vel unica erectis ; spicis fructi- 
feris distigmaticis breviter pedunculatis cylindraceis subter- 
nis superne incrassato-clavatis densifloris suberectis, seepe 
apice staminiferis ; fructibus ellipticis sublentiformibus glabris 
ore integro et protruso, squame® ovatz acutiuscule sube- 
quantibus. 
Culm 20—30 inches high, erect, triquetrous, stiff, some- 
what reclined at the summit, ratherobtuse angled and scarce- 
ly scabrous ; leaves linear-lanceolate, striate, stiff, long as 
ue culm, spreading ; bracts long, leafy, much surpassing the 
culm, without sheaths; staminate spikes one to four, erect, 
subsessile, lower one bracteate, staminate scale oblong, 
somewhat obtuse, tawny; stigmas two; pistillate spikes 
about three, shortly pedunculate, suberect, cylindric, thick- 
ened above, an inch to two inches long; densely flowered ; 
fruit elliptic, somewhat lenticular, rather small, glabrous, en- 
tire and protruded at the orifice; pistillate scale ovate, ra- 
ther acute, tawny on the edge, about equalling the fruit, and 
as it is narrower, giving a light appearance to the spikes. 
Colour of the plant bright green. 
Flowers in May—grows in the form of bogs in wet situa- 
tions 5 common. 
This species has been confounded with C. acuta, to which 
it is closely related. But it differs in its larger and thicker 
spikes densely flowered, in its wider leaves, in its less acute 
and even obtuse angled culm scarcely scabrous, and infits 
spikes being much lighter coloured. It is described by 
Schkuhr, but he has given no figure of it. Our plant 
agrees with a specimen from Sweden. 
The three preceding species with C. stricta and C. crinita 
form a very natural subdivision in thisgenus. Excepting C. 
crimta, they strongly resemble each other, and wil! not be 
distinguished without particular attention. 
