1S94.] J-1^ [Rothrock. 



3 Magnolia glaiica L Sweet bay, or swamp laurel. 



2 Magnolia acuminata L. Cucumber tree. 



3 Magnolia tripetala L Umbrella tree. 



1 Liriodendron tulipifera L Tulip poplar. 



2 Tilia Americana L Basswood. 



2 Tilia heteroph^lla Vent White basswood. 



3 Ilex opaca Ait American bolly. 



3 Ilex monticola Gray Mountain iiolly. 



3 ^sculus oclandra Marshall Sweet buckeye. 



3 .^sculus glabra Willd Ohio buckeye. 



3 Acer Pennsylvanica L Striped maple. 



1 Acer saccharinum Wang Sugar maple. 



2 Acer dasycarpum Elirli White, or silver maple. 



2 Acer rubrum L Red, or swamp maple. 



3 Negundo aceroides McBnch Box elder. 



3 Rhus typhina L Staghorn sumach. 



1 Robinia pseudacacia L Locust. 



3 Gymnocladus Canadensis Lam . . . .Kentucky coffee tree. 



3 Gleditschia triacanthos L Honey-locust. 



3 Prunus Americana Marshall Wild yellow, or red plum. 



3 Prunus Alieghaniensis Porter Allegheny plum. 



3 Prunus serotina Ehrh Wild black cherry. 



3 Pyrus coronaria L Crab apple. 



3 Pyrus Americana DC American mountain ash. 



3 Crataegus coccinea L Scarlet haw, or whitethorn. 



3 CrattEgus punctata Jacq Blackthorn, or pear haw. 



3 Cratffgns Crus-galli Cockspur, or Newcastle thorn. 



3 Liqnidambar Styraciflua L Sweet-gum tree, or bilsted. 



3 Cornus florida L Dogwood, or flowering dogwood, 



3 Cornus alternifolia L., f Alternate-leaved dogwood. 



2 Nyssa sylvatica Marshall Sour-gum, tupelo, pepperidge. 



3 Oxydendrum arboreum DC Sorrel-tree, sour-wood. 



2 Diospyros Virginiana L Persimmon. 



1 Fraxinus Americana L White ash. 



2 Fraxinus pubescens Lam Red ash. 



2 Fraxinus viridis Michx., f Green ash. 



2 Fraxinus sambucifolia Lam .Black, hoop, ground, or water ash. 



3 Chionanthus Virginica L Fringe tree. 



2 Catalpa bignonioides Walt Calalpa, Indian bean, cigar tree. 



This tree is not a native of Pennsylvania, but is becoming rapidly and 

 generally naturalized, and is likely to be of considerable importance. 

 For this reason I have included it in my list. 



2 Sassafras officinale Nees Sassafras. 



2 Ulmus fulva Michx Slippery elm, red elm. 



1 Ulmus Americana L White elm, American elm. 



