CNICUS-CONIUM. 89 



CNICUS. 17—1. (Cinarocephalm.') [From /tnao, to scratch.] 



lanceola' tus, (commonthislle, p. J. J*.) leaves decurrent, hispid, pinnatifid; 

 divisions 2-lobed, divaricate, spinose; calyx ovate, with spider- vveb-liko 

 pubescence ; scales lanceolate, spinose, spreading. 2-4 f. 



arven"sis, (Canada thistle, p. J. 11-.) leaves sessile, pinnatifid, ciliate, spinose 

 stem panicled ; calyx ovate, mucronate ; scales broad-lanceolate, close- 

 pressed ; margin woolly. 2-3 f. 

 CNIDUM. 5—2. (UinbeltifercB.) 



ca7iaden"se, (w. Ja. %.) stem angular, flexuous, leaves bipinnate, shining; 

 leafets many-parted ; segments lanceolate ; in volucrum many-leaved. Banks 

 of streams. 

 €OCHLEARIA. 14—1. {Crucifercb.) [From coeWeare, a spoon.] 



armora'cia, (horse radish, w. J. %..) 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 monliey's liead.] 



iiucifera, stem erect, vertical, crowned with long, pinnate leaves. Cocoa- 

 nut. E. and W. Indies. The species butyracea, affords the palm-oil. 

 COIX. 19—3. (GraminecB.) [From Aozx, a palm-leaved tree. 

 lach"ryma, (Job's tear, Ju. ©•) culm semi-terete above ; flowers naked; fruit 

 ovate. 

 COLLINSIA. 13—2. {Scrophularim.) [In honour of 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. (LeguminostB.) 



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 botany in the seventeenth century.] 



angustifo'lia, (day-flower, b. Ju. %.) 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. %.) stitfly 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. 



cceles"tis, resembles, in most particulars, the preceding species; the leaves are 

 sheathing, broad at the baise, 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. 



comviu'nis, (b. Au. O.) corolla unequal, leaves ovate, lanceolate, acute, stem 

 creeping, glabrous. S. 

 ClOMPTONIA. 19—3. (^Amentacem.) [LordCompton.] 



asplenifo'lia, (sweet fern, C. g. Ap. Yi.) leaves long-linear, alternately cre- 

 nate-pinnatifid. 18-48 i. 



CONFERVA. 21—4. (Alges.) [From core/erueo, to knit together, so named from its supposed 

 use in heaUng broken bones.] 

 ru^fa, threads ramcse, capillary, straight, obsoletely geniculate; branches 

 and branchlets opposite, remotish; length of the joints equalling the diam- 

 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. (Umhelliferm.) [From ^onao, poisonous.] 

 macula'tum, (poison hemlock, w. Ju. 71..) stem very branching, spotted ; leave? 

 very compound ; seed striate. Var. crispatulum, leaves crisped ; ultimate 

 divisions acuminate; or terminated in a bristle. 2-4 f. 



