21 



2a. Shrub of sandy soil, shore of Lake Erie 



Bayberry, Myrica carolinensis. 

 2b. Shrub of bogs and shores, northern half of state 



Sweet dale, Myrica gale. 



JUGLANDACEAE, the Walnut Family 



Trees with alternate pinnately compound leaves and flowers in 

 catkins. 



la. Leaflets 11 23; pith divided by partitions into chambers 2. 

 Ib. Leaflets 5 11; pith not partitioned (Hickory) 3. 



2a. Pith brown; bark with flat longitudinal ridges 



Butternut, Juglans cinerea* 

 2b. Pith cream-color; bark of trunk without flat ridges 



Black Walnut, Juglans nigra. 



3a. Bark of the trunk essentially smooth, not deeply furrowed or 



shaggy 4. 

 3b. Bark of the trunk deeply furrowed or shaggy 6. 



4a. Leaflets glabrous beneath; buds greenish 5. 



4b. Leaflets somewhat pubescent beneath; buds bright yellow 



Bitter Nut, Carya cordiformis. 



5a. Twigs hairy Small-fruited Hickory, Carya microcarpa. 



5b. Twigs smooth Pignut Hickory, Carya glabra. 



6a. Twigs and leaves both pubescent 7. 



6b. Twigs nearly smooth; leaves smooth beneath 



Shag-bark Hickory, Carya ovata. 



7a. Twigs brownish; buds densely hairy 



Mocker-nut Hickory? Carya alba, 

 7b. Twigs orange; buds very slightly hairy 



King-nut Hickory, Carya laciniosa. 



BETULACEAE, the Birch Family 



Trees or shrubs with alternate simple leaves and inconspicuous 

 monoecious flowers, the staminate flowers in catkins, and the pistil- 

 late in catkins or small clusters. 



la. Trees, with white or yellowish bark exfoliating in thin papery 

 plates or scales 2. 



Ib. Tree or shrub, with smooth, dark gray bark; trunk fluted with 

 prominent longitudinal ridges. Hornbeam, Carpinus caroliniana. 



Ic. Trees or shrubs; the bark more or less roughened, but not ex- 

 foliating; trunk not fluted 3. 



2a. Bark white or chalky 



Paper Birch, Betula alba var, papyrifera. 

 2b. Bark yellowish Yellow Birch, Betula lutea. 



