Garicography. 933 
different to be called by the name of either. Constant as Mr, 
Schweinitz found its characters to be, it deserved to be con- 
sidered a distinct species. 
83. C. dioica. L. 
Wahl. no.1. Pers.no.1. Schw. and Torrey no.1. 
Schk. tab, A fig. 1. and tab, Q and W fig. 2. 
C. Linneana, Schk. Car. II. p. 3. tab. A fig. 1. 
Spica simplici dioica, rarissime androgyna superne stami- 
nifera, oblonga; spica fructifera distigmatica oblonga vel 
ovata subdensiflora; fructibus ovali-ovatis utrinque convexis 
hervosis erectiusculis superne serrulaté marginatis squamam 
evatam equantibus. 
Culm 4—10 inches high, triquetrous, small, smooth, some- 
times scabrous above in a slight degree ; leaves triquetrous, 
setaceous, slender, erect, sheathing towards the base, about 
the length of the culm; spikes simple, dioecious; staminate 
spike oblong with an ovate or oblong, obtuse, tawny scale; 
pistillate spikes oblong, sometimes ovate, somewhat dense 
flowered ; stigmas two, fruit ovate, or oval-ovate, convex, 
nerved, rather erect, with an entire orifice and a margin ser- 
rulate or scabrous above; pistillate scale ovate, somewhat 
acute, tawny, green on the keel, about the length of the fruit. 
This plant is frequent in the north of Europe; found in the 
woods of Arctic America by Dr. Richardson ; will probably 
be found in the Alpine districts of the Northern States. 
8.C. Davalliana, Wahl. C. Davalliana, Smith, 
Pers. no.2. Rees’ Cye. no. 2. 
Schk. tab, A fig. 2. 
Spica simplici oblonga distigmatica subdensiflora dioica, 
yard androgyna superne staminifera; fructibus ovato-lanceo- 
latis attenuatis convexis recurvis, squama ovata paulo longio- 
ribus ; culmis foliisque serrulatis. 
Culm often longer than the other ; leaves similar, but only 
about one third the length of the culm, and serrulate or his- 
pid; root like the other, creeping. 
This plant is found with the other in Europe, and I have 
followed Wahlenberg in considering it only a variety of C. di- 
oica. On the specimens of C. dioica received from Europe, the 
leaves vary from the smooth to the distinetly serrulate, and the 
capsules of someexaetly resemble those of ©. Davalliana as 
