Index 



PAGE 



" Shein saft blumen " 7 



Skunk-cabbage (S. foetidus) 112 



destructive to insect life 1 14 



Speculations, Early, regarding the functions of honey 5 



Spiranthes (Lady's-tresses) 150 



Sprengel, Conrad, announces that flowers are fertilized by in- 

 sects 7 



begins his investigations 6 



process of flower fertilization suggested by 7 



"Secrets of Nature in Forms and Fertilization Dis- 

 covered " 6 



weak points in his theory of flower fertilization 7, S 



where his errors lay i r 



Stamens, described 3 



lessons of 25 



varieties of 27 



Stigma, must receive pollen in order to mature fruit 4 



Survival of the fittest, law of, see Natural selection. 



Symplocarpus foetidus (Sktmk-cabbage) 112 



T 



Tineidae moth 56 



Trifolium pratense (Red clover) 43 



Trout lily (E. Americanum) 123 



V 



V^ariation, tendency to, in individual flowers 14 



V'ariations in flowers sometimes indicative of the beginning of 



a ^lew species 34 



V^iolet. The 16 



its cleistogamous buds 16 



w 



Wasp, The 80 



Whippoorwill's shoe (C. hirsutum) 165 



Woad-waxen (G. tinctoria) 47 



Wood-betony, The (P. Canadense) 85 



Wood-sorrel (Oxalis) 66 



