282 Caricography. 
pistillate scale ovate-lanceolate, slightly tawny, not quite half 
so long as the fruit. Colour of the culm and leaves deep 
green, 
Flowers in Jaune—grows in wet meadows on the Mushing- 
tim river. 
_ Mr. Schweinitz, to whom I am indebted for the plant, 
found it in great abundance, and remarked in a letter its 
strong resemblance to C. scoparia. It differs however from 
this species in the shape and magnitude of its spikelets ; inits 
fruit and scale; and in its colour and size; and is a well cha- 
racterized species. 
$2. C. nigromarginata. Sechw. An. Tab. 
Spieis distinctis ; spica staminifera solitaria sessilis spicis 
fructiferis tristigmaticis binis ovatis sessilibus staminifer 
areté approximatis ; pedunculis longis radicalibus subternis 
e radice eadem ortis; fructibus ovatis subtriquetris subconi- 
vo-rostratis bidentatis pubescentibus, squame ovate acuti- 
uscule eequalibus. 
Culm, or rather peduncles, radical, two to four from the 
same root or sheath, slender, triquetrous, slightly scabrous 
above, one to eight inches long, decumbent; leaves radical, 
striate, carinate, flat, longer than the peduncles, reddish- 
brown at the base ; staminate spike single, sessile, short, often 
very obscure, from the same scale-like bract with the lower 
pistillate and often not rising as high as the pistillate, with an 
ovate and obtuse scale dark brown, white on the edge, green 
on the keel; pistillate spikes two, rarely one, sessile, ovate, 
about four-flowered, approximate, close to the staminate, the 
lower with an ovate-lanceolate, scale-like bract ; fruit ovate,: 
somewhat triquetrous, rostrate and tapering above, pubes- 
cent, two-toothed, stigmas two; pistillate scale ovate, rather 
long obtuse, dark brown, green on the keel, about as long as 
the fruit. Colour of the plant rather light green. 
Flowers in May—grows on hills in Penn. Schweinitz. 
This is a singular and beautiful species. By some it has 
been thought a variety of C. pedunculata, and by others, of C. 
marginata. ‘The former, it resembles in its peduncles and 
leaves; the latter, in its spikes and fruit. From the form- 
er, it differs entirely in its fruit and scale; from the latter, 
in its culm and leaves, &c, Could we suppose it to be a 
species formed by the union of the two, it would be far too 
