Index 



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Calyx, defined 3 



Canada lily (L. Canadense) 120 



Chamaelirium luteum (Devil's-bit) 119 



Cleistogamous bud of the violet described 17 



buds sometimes hidden below ground 17 



flowers an economical provision of nature 17 



Clover, Red (T. pratense) 43 



Collinsonia Canadense (Horse-balm) 94 



Color preferences of various insects. . 23 



result of adaptation to insects 8 



Compositae manners . 67 



Corolla, defined 3 



Cross-fertilization, a direct advantage to the flower 13 



agents employed by nature to effect 12 



method explained by Darwin 12 



theory 1-36 



— universality of this method in nature '. . 17 



Cross-fertilized flowers the result of natural selection 13 



Cypripedium acaule (Moccasin-flower) 158 



hirsutum (Large yellow lady's-slipper) 165 



parviflorum (Smaller yellow lady's-slipper) 166 



D 



Dandelion, self-fertilizing resource of 32 



Darwin's revelations regarding flower fertilization 11 



theory of fertilization tested by existing facts 13 



Degeneration, penalty of 33 



Desmodium accuminatus (Beggar's-tick) 45 



Devil's-bit (C. luteum) 119 



Dimorphic flowers Ci 



Dogbane (Apocynum) 108 



Dog-tooth violet (E. Americanum) 123 



E 



Evening primrose. The (CE. biennis) 49 



"A primrose by the river's brim" 169 



' ' A tuft of evening primroses " 50 



insect visitor of 59 



172 



