(74) 



4. Negundo aceroides, Moench. Vox elder. 



5. Staphylea trifolia, L. Bladder nut. 



6. Euonyinus atropurpureus, Jacq. IJurning bush. 



7. Sanibucus canadensis, L. Elder. 



8. Fraxinus americana, L. White ash. 



9. Fraxinus pubcscens, Lam. lied ash. 



10. Fraxinus viridis, Michx., f. Green ash. 



11. Fraxinus sanibucifolia, Lam. Black ash. 



12. Fraxinus quadrangulata, Michx. Blue ash. 



13. Viburnum lentago, L. Sheep berry. 



14. Viburnum dentatum, L. Arrow wood. 



15. Cornus paniculata, L'Her. Panicled cornel 



16. Lonicera flava, Sims Yellow honeysuckle. 



17. Tecoma radicans, Juss Trumpet-creeper. 



18. Catalpa bignonioides, Walt. Indian bean. 



19. Cephalanthus occidentalis, L. Button bush. 



20. Rhanmus laceolatus, Pursh Buck-thorn. 



21. Horizontal cut of the bud of Fraxinus sambucifolia. 



22. Horizontal cut of the bud of Acer dasycarpum. 



23. Horizontal cut of the bud of Staphylea trifolia. 



24. Horizontal cut of the bud of Cornus paniculata. 



25. Horizontal cut of the bud of Euonymus atropurpureus. 



PLATE II. 



1. Quercus alba, L, White oak. 



2. Quercus macrocarpa, Michx. Burr oak. 



3. Quercus bicolor, Willd. Swamp white oak. 



4. Quercus prinus, L. (Var. acuminata, Michx.) Chestnut oak. 



5. Quercus imbricaria, Michx. Shingle oak. 



6. Quercus coccinea, Wang. Scarlet oak. 



7. Quercus rubra, L. Red oak. 



8. Quercus nigra, L. Black-jack oak.- 



9. Populus monilifera. Ait. Cottonwood. 



10. Populus heterophylla, L. Downy poplar. 



11. Populus grandidentata, Michx. Large-toothed aspen 



12. Populus tremuloides, Michx Aspen. 



13. Corylus americana, Walt. Hazlenut. 



14. Fagus ferruginea, Ait. Beech. 



15. Ostrya virginica, Willd. Hop hornbeam. 



16. Carpinus americana, Michx. Hornbeam. 



17. Juglans cinerea, L. I utternut. 



18. Juglans nigra, L. Black walnut. 



19. Carya alba, Nutt. Hickory. 



20. ('arya tomentosa, Nutt. Mockernut. 



21. Carya olivaeformis, Nutt. Pecan. 



22. Carya amara, Nutt Bitternvit. 



23. Liquidambar styraciflua, L. Sweet gum 



