INTRODUCTION. 



33 



To show the relation between the return of birds from the 

 South and the vernal change of vegetation, I give the following dates 

 of the leafing and flowering of certain plants at Mt. Carmel, as noted 

 in the spring of 1872, by Dr. J. Schneck. It should be remarked, 

 however, that the season was much later than usual. (See foot- 

 note below.) 



Species. 



DatB of 

 leiiflng. 



Date of 

 flowering. 



Red Maple (Acei- ruhrum) 



Silver Maple [Acer dasycarpum) 



Sugar Maple {Acer saccharinum) 



Shell-bark Hickory iCarya alba) 



Kedbud {Cercis canadensis) 



Wild Cherry (.Primus serotina) 



Flowering Dogwood [Gornus ftorida) 



White Ash {Fraxinus americana) 



Tulip Poplar [Liriodendron tulipifera) 



Peach (.Fersica vulgaris) 



Apple (Pyrus malus) 



White Oak {Quercus alia) 



Lilac (Syringa vulgaris) 



American Elm (Ulmus americana) 



Wild Columbine lAguilegia canadensis) 



Spring Beauty (.Claytoniavirninica) 



Dogs-tooth Violet {Erythroniumamericanum). 



Orane's-blU [Geranium maeulatum) 



Liverwort (Hepatica triloba) 



Blue Flag [Iris versicolor) 



May Apple (Podophyllum peltatum) 



Blackberry {Rubus villosus) 



Elder iSambucus canadensis) 



Blood-root (Sanguinaria canadens ts) 



April 



12. 

 12. 

 15. 

 13. 

 20.... 

 5.... 

 20. 



April i. 



" 20. 



•• 13. 



•• 13. 



•• 19. 



April 



April 



March 



April 



March 



April 



March 20*. 

 April 8.. 



April 10. 

 ■• 25. 



April 12 



April 12.. 

 ■' 20.. 



April 12.. 

 March 30t. 



April 12t. 



March 31 § 



April 14.. 



* In 1876, flowered February 1. 

 tin 187{i, flowered February 15. 

 1 In 1876. flowered March 2. 

 §In 1876, flowered March 2. 



-S 



