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 leaHug ami 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. 



Dati of 

 teaflog. 



Red Maple (Acer ruhriim) 



Silver Maple [Acer dasycarpum) 



Sugar Maple {Acer saccharinum) 



Shell-bark Hickory {Cary a alba) 



Redbud {Cercis canadensis) 



Wild Cherry (frwnus seroifna) 



Flowering Dogwood (Comus florid,:) 



White Ash (Fraxinus americana) 



Tulip Poplar iLiriodendron tulii/ifera) 



Peach (Persica vulgaris) 



Apple (Pyrus 7nalus) 



White Oalc [Quercus alba) 



Lilac i^yringa vulgaris) 



American Elm (Ulmiis americana) 



Wild Columbine (Aguilegia canadensii^) 



Spring Beauty iClaytoniavirginica) 



Dogs-tooth Violet iErvthroniumamericaninn) . 



Crane's-bill (Geranium maculatum) 



Liverwort (Hepatica triloba) 



Blue Flag {Iris versicolor) 



May Apple {Podophyllum peltalnm) , 



Blaelcberry {Rubusvillnsus) , 



Elder {Samhucns canaden s i.<) 



Blood-root {Sanguinaria canadensis) 



\pril Vi... 

 March 30... 

 April 10 .. 

 .Uatchao... 

 April 12 .. 



March 20*. 

 April 8.. 



April 10.. 



•' 25.. 



April 12.. 

 March 30t. 



• In 1876, flowered February 1. 

 tin ISitl, flowered Feliruary 15. 

 : In 18:6. flowered March 2. 

 S In 1876, flowered March 2. 



