8 FERNS AND 



CERCIS, L. Judas-tree ; red-bud. 



canadensis, L. 

 CIMICIFUGA, L. bugbane; black-snake root. 



racemosa, Ell. 



CERASUS, Town, wild cherry. 



virginiana, D. C. 

 CHARA. 



flexilis, Willd. 



CHELONE, Tourn. snake-head ; turtle-head. 



glabra, L. 

 CHIMAPHILA, Pursh. wintergreen. 



maculata, Pursh. spotted wintergreen. 

 CICUTA, L. water hemlock. 



maculata, L. spotted cowbane. 



bulbifera, L. narrow-leaved hemlock. 

 CINNA, L. Indian reed. 



arundinacea, L. 



CIRC^EA, Tourn. enchanters; nightshade. 



lutetiana, L. 

 CHENOPODIUM, L. goose-foot. 



album, L. 



CLAYTONIA, L. spring beauty. 



virginica, L. 



lanceolata, Pursh. 

 CLEMATIS, L. virgin's bower. 



viorna, L. leather flower. 



virginica, L. common virgin's bower. 



CIRCIUM, Tourn. plumed thistle. 



discolor, Spreng. two-colored thistle. 



muticum, Mich, clammy thistle. 



altisimum, Spreng. tall thistle. 

 COLLINSIA, Nutt. 



verna, Nutt. 

 COLLINSONIA, L. horse balm. 



canadensis, L. 

 CONVOLVOLUS, L. morning-glory. 



nil, L. 



lacunosus, Spreng. 

 COMMELYNA, Dill, day-flower. 



angustifolia, Mich. 

 CONOBEA, Aublet, (capraria, Michx.) 



multifida, Benth. 



CORALLORHIZA, Hatter, coral root, 

 odontorhiza, Nutt. 



