10 



ON SEEDLINGS 



present varied forms.' Even, however, if this suggestion 

 were the real explanation of the comparative simplicity, it 

 would throw no light on the differences between the coty- 

 ledons of different species. 



FIG. 7. Seedling of Ceratocephalus fal- 

 catus. Nat. size. The numerals indicate 

 the successive leaves. 



FIG. 5. Seedling of Fceni- 

 .'Culum vulgar -e. (iHalf nat. 

 size. 



FIG. 6. Seedling of Coreopsis 

 filifolia. Half nat. size. 



-Seedling of Platanus. 

 Nat. size. 



Though cotyledons do not present nearly such extensive 

 variations as leaves, still they do differ considerably from one 

 another. 



Some are narrow, in illustration of which I may refer to 



