CNICUS-CONIUM. 
89 
CNICUS. 17—1. iCinarocephaloR.') [From A;wao, to scratch.] 
lanceola'tus, (common thistle, p. J. J*.) leaves decurrent, hispid, pinnalifid; 
divisions 2-lobed, divaricate, spinose; calyx ovate, with spider-web-like 
pubescence ; scales lanceolate, spinose, spreading. 2-4 f. 
arven^sis, (Canada thistle, p. J. %.) leaves sessile, pinnatifid, ciliate, spinose j 
stem panicled ; calyx ovate, mucronate ; scales broad-lanceolate, close- 
pressed ; margin woolly. 2-3 f. 
CNIDUM. 5—2. iUmbellifercB.) 
canaden^'se, (w. Ju. %.) stem angular, flexuous, leaves bipinnate, shining ; 
leafets many-parted; segments lanceolate ; in voluprum many-leaved. Banks 
of streams. 
COCHLEARIA. 14—1. (^Crudferce,.) [From cochleare, a spoon.] 
armora'cia, (horse radish, w. J. %..) radical leaves lanceolate, crenate ; cau- 
line ones gashed. Naturalized. Ex. 
officiiva'lis, (scurvy grass,) radical leaves roundish ; cauline ones oblong, sub- 
pinnate ; silicles globose. 
COCOS. 19—6. iPalmce,.) [From the Portuguese coquen, monkey ; the three holes at the 
end of the cocoa-n^t shell giving it the appearance of a monliey's head.] 
nucif'era, stem efect, vertical, crowned with long, pinnate leaves. Cocoa- 
nut. E. and W. Indies. The species butyracea, affords the palm-oil. 
COIX. 19—3. iGraminece.') [From koix, a palm-leaved tree. 
lacJL"ryma, (Job's tear, Ju. @.) culm semi-terete above ; flowers naked; fruit 
ovate. 
COLLINSIA. 13—2. (ScrophularicB.) [In honour -pf Zaccheus Collins, of Philadelphia.] 
verna, (b. M. ©.) leaves opposite, ovate-oblong, sessile, obtuse, the lower ones 
with a long petiole ; peduncles long, axillary, 1-flowered. Banks of streams. 
COLLINSONIA. 2—1. (LabiatcB.) 
ca7iaden"sis, (y. Au. %) leaves broad-cordate, ovate, glabrous; teeth of the 
calyx short, subulate ; panicle terminal, compound. Woods. 2-3 f. 
COLUTEA. 16—10. {Leguminosoi.) 
vesica'ria, (senna herb, y. Ju.) leaves pinnate; leafets ovate; stem herbace- 
ous, decumbent, villose ; legumes orbicular, inflated. 
COMMELINA. 3 — 1. iJunci.) [In honour of the Commelins, a family of Amsterdam, who 
advanced tlie science of botany in the seventeenth century.] 
. angustifo'lia, (day-flower, b. Ju. %..) assurgent, vi^eak, somewhat glabrous; 
leaves lanceo-linear, very acute, flat, glabrous; sheaths sub-ciliate; bracts 
(or involucres) peduncled, solitary, short-cordate. 12 i. 
virgini'ca, (b. Ju. 'Zj..) stiffly erect, all over pubescent ; leaves long, lanceolate ; 
sheaths red-bearded at the throat; bracts (or involucres) sub-sessile, lateral 
and terminal ; calyx petal-like, 3-leaved, nearly equal. 2 f. 
cmUs"lis, resembles, in most particulars, the preceding species; the leaves are 
sheathing, broad at the base, rough on the edges. The flower is of a beau- 
tiful light blue, concealed by the I'oiiaceous sheath before blossoming. Mex- 
ico. Blue commelina of the florists. 
commu'nis, (b. Au. O.) corolla unequal, leaves ovate, lanceolate, acute, stem 
creeping, glabrous. /S. 
COMPTONIA. 19—3. iAmentacecn.) [LordCompton.] 
asplenifo'lia, {svfeel fern, C. g. Ap. l^.) leaves long-linear, alternately cre- 
nate-pinnatifid. 18-48 i. 
CONFERVA. 21—4. iAlgce.) [From conferveo, to knit together, so named from its supposed 
use in healing broken bones.] 
ru'fa, threads ramose, capillary, straight, obsoletely geniculate; branches 
and branchlets opposite, remotish ; length of the joints equalling the diano- 
eter. In the sea. Reddish yellow, shining, in fasicles; threads of the 
thickness of human hair, 2 inches and longer, flaccid, soft. 
CONIUM. 5—2. (UmbellifercR.) [From /cowao, poisonous.] 
macula'tum, (poison hemlock, w. Ju. %.) stem very branching, spotted ; leaves 
very compound ; seed striate. Y ?ir. crispatulum, leaves crisped; ultimafe 
divisions acuminate, or terminated in a bristle. 2-4 f. 
