CNICUS—CONIUM. 
89 
CNICUS. 17—1. ( Cinarocephala .) [From knao, to scratch.] 
lanceo'laJtus , (common thistle, p. J. tf\) leaves decurrent, hispid, pinnatifid; 
divisions 2 -lobed, divaricate, spinose; calyx ovate, with spider-web-like 
pubescence ; scales lanceolate, spinose, spreading 1 . 2-4 f. 
arven"sis , (Canada thistle, p. J. leaves sessile, pinnatifid, ciliate, spinose; 
stem panicled; calyx ovate, mucronate; scales broad-lanceolate, close- 
pressed ; margin woolly. 2-3 f. 
CNIDUM. 5—2. ( Umbelliferce.) 
canaden"se y (w. Ju. %.) stem angular, flexuous, leaves bipinnate, shining; 
leafets many-parted; segments lanceolate; involucrum many-leaved. Banks 
of streams. 
COCHLEARIA. 14—1. (Crucifer ce .) [From cochleare , a spoon.] 
armora'cia, (horse radish, w. J. 'll-.) radical leaves lanceolate, crenate; cau~ 
line ones gashed. Naturalized. Ex. 
ojjicirva'lis , (scurvy grass,) radical leaves roundish ; cauline ones oblong, sub- 
pinnate ; silicles globose. 
COCOS. 19—6. ( Palma .) [From the Portuguese coquen , monkey; the three holes at the 
end of the cocoa-nut shell giving it the appearance of a monkey’s head.] 
nucif"era , stem erect, vertical, crowned with long, pinnate leaves. Cocoa- 
nut. E. and W. Indies. The species buhjracea , affords the palm-oil. 
COIX. 19—3. ( Graminece .) [From koix, a palm-leaved tree. 
lachf'ryma , (Job’s tear, Ju. ©.) culm semi-terete above ; flowers naked; fruit 
ovate. 
COLLINSIA. 13—2. ( Scrophularice .) [In honour of Zaccheus Collins, of Philadelphia.] 
verna , (b. M. 0 .) leaves opposite, ovate-oblong, sessile, obtuse, the lower ones 
with a long petiole ; peduncles long, axillary, 1-flowered. Banks of streams. 
COLLINSONIA. 2—1. ( Labiatce .) 
canaden"sis , (y. Au. %.) leaves broad-cordate, ovate, glabrous; teeth of the 
calyx short, subulate ; panicle terminal, compound. Woods. 2-3 f. 
COLUTEA. 16—10. ( Leguminosce .) 
vesica'ria, (senna herb, y. Ju.) leaves pinnate; leafets ovate; stem herbace¬ 
ous, decumbent, villose; legumes orbicular, inflated. 
COMMELINA. 3—1. ( Junci .) [In honour of the Commelins, a family of Amsterdam, who 
advanced the science of v botany in the seventeenth century.] 
angustifo'lia , (day-flower, b. Ju. Tj..) assurgent, weak, 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. A-) 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. 
codes 11 tis, 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 foliaceous 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. (Ament ace ce.) [Lord Compton.] 
asplenifo'lia , (sweet fern, C. g. Ap. b.) leaves long-linear, alternately ere- 
nate-pirmatifid. 18-48 i. 
CONFERVA. 21—4. (Algce.) [From conferveo, to knit together, so named from its supposed 
use in healing broken bones.] 
rufa , threads ramose, capillary, straight, obsoletely geniculate; branches 
and branchlets opposite, remotish; lengt h of the joints equalling the diam¬ 
eter. In the sea. Reddish yellow, shining, in fasieles; threads of the 
thickness of human hair, 2 inches and longer, flaccid, soft. 
CONIUM. 5—2. ( Umbelliferce .) [From konao, poisonous.] 
macula'turn , (poison hemlock, w. Ju. A-) stem very branching, spotted; leaves 
very compound; seed striate. Var . crispatulum, leaves crisped; ultimate 
divisions acuminate, or terminated in a bristle. 2-4 f. 
