424 GEOLOGY OF OHIO. 



deeper, but less extensive, and are frequently characterized by tamarack 

 trees. 

 In the survey of the county the following species of trees were noted : 



Quercus alba — White Oak L. 



" ?— Chestnut-leaved Oak 



" rubra — Eed Oak L. 



Carya alba — Shag-bark Hickory s Nutt. 



Juglans nigra — Black Walnut L. 



iEsculus glabra — Buckeye Willd. 



TTlrnus Americana — American Elm (pi. Clayt., Willd.) L. 



Fraxinus quadrangulata — Blue Ash Michx. 



Tilia Americana — Basswood L. 



Fraxinus sambucifolia — Black Ash , Lam. 



" Americana — White Ash L. 



Prunus' Americana — Wild Plum Marsh. 



Quercus imbricaria — Laurel-leaved Oak Michx. 



Acer saccharinum — Sugar Maple Wang. 



" rubrum— Soft Maple L. 



Prunus serotina — Black Cherry Ehr. 



Crataegus tomentosa — Thorn L. 



Ostrya Virginica — Ironwood Willd. 



Quercus macrocarpa — Burr Oak Michx. 



" palustris (Pin Oak) DuBoi. 



Celtis crassifolia — Hackberry Lam. 



Salix nigra — Willow Marsh. 



Populus tremuloides — Aspen Michx. 



Gleditschia triacanthos — Honey Locust L. 



Populus monilifera — Cottonwood Ait. 



Platanus occidentalis — Sycamore L. 



Fagus ferruginea — Beech Ait. 



Nyssa multiflora — Pepperidge Wang. 



Juglans cinerea — Butternut L. 



Ehus glabra — Sumac L. 



Sassafras officinalis — Sassafras : ... Nees. 



Carplnus Americana — Water Beech Michx. 



Asimina triloba — Pawpaw Dumal. 



Morus rubra — Mulberry L. 



Zanthoxylum Americanum — Prickly Ash Mill. 



Gymnocladus Canadensis — Kentucky Coffee Tree Lam. 



Liriodendron tulipifera— Tulip Tree L. 



Populus balsamifera — Balm of Gilead L. 



Populus grandidentata — Great-toothed Poplar Michx. 



Euonymus atropurpureus — Wahoo Jacq. 



Ulmus fulva— Slippery Elm Michx. 



Pyrus coronaria — Wild Apple L. 



Larix Americana — Tamarack Michx. 



