Index 



PAGE 



Loosestrife. Purple (L. salicaria) 66 



Lucerne, The (M. sativa) 46 



Ly thrum salicaria (Purple loosestrife) 66 



M 



Madder family, The 61 



Meadow fritillary (Brenthis bellona) 65 



Medicago sativa (Lucerne) 46 



Milkweed, Common (A. cornuta) 97 



how it entraps its benefactors 103 



Mint family, The 91 



Moccasin-flower (C. acaule) 15 / 



Moth that destroys the Evening primrose bud^- 56 



that fertilizes the Evening primrose 58 



Mountain laurel. The (K. latifolia) 71 



N 



Natural selection, conditions under which it works 34 



how it perfects the flowers 13 



how it works in adapting flower and insect 24 



Nature's frugality 34 



inexhaustible treasures 167 



tolerance 32 



Nectar, laws governing its secretion 24 



result of adaptation to insects 8 



Nectaries, work of natural selection in developing 22 



Nectary riddles and their explanation 21 



Non-flowering plants 17 



o 



Oenothera biennis (Evening primrose) 49 



Orchid, An, defined 126 



blossoms, how they differ from other flowers 125 



Large round-leafed (H. orbiculata) 141 



Purple-fringed (H. psycodes) 135 



Ragged (H. lacera) . 136 



Showy (O. spectabilis) 129 



Orchids, adaptations to eyes, tongues, etc., of insects 134 



columns of 127 



175 



