Key to Trees and Shrubs. 123 



14. Climbiug vines 15 . 



14. Trees or upright shrubs 17 . 



15. Leaves opposite 1(J . page 



15. Leaves alternate, flowers showy, pod elongated Kraioihia. 71 



10. Leaflets o-7 ; tails of fruit plumose Clenialis. 4(1 



16. Leaflets 9-11 ; corolla 'ly2-?i in. long Teconia. 10'.» 



17. Leaflets 3-5; twigs light green, fruit a double samara Acer. 11 



17. Leaflets 5 to many; twigs, etc., not as above (l.Si. 



18. Leaves 2-4 ft. long; leaflets 21-41; tree, bark smooth Ailanthiis. 73 



18. Leaves not so long, leaflets less numerous (19 . 



19. Pith in transverse plates, leaflets many Juglaits. 28 



19. Pith not in transverse plates (20 . 

 20. Shrubs or small trees ^21. 

 20. Large forest trees 24 . 



'"21." Shrub not strictly upright, somewhat climbing by aerial root- 

 lets •. Tccoma. 109 



21. Strictly upright shrubs or small trees 22 . 



22. Flowers in panicles; fruit dry; leaflets entire or sinuate Rhus. 75 



22. Flowers in flat cymes or panicles; fruit a berry; leaflets serrate or doubly- 

 serrate 23 . 



23. Leaflets serrate; pith large; bark warty; shrub Sainbncus. 113 



23. Leaflets mostly doubly-serrate ; pith not large ; small tree or 



shrub. Sorhus. (i2 



24. Leaves alternate ; fruit a nut hickory-nut Hicoria. 28 



24. Leaves opposite ; fruit winged at apex Fraxiints. 9(i 



25. Parasitic shrubs on limbs of trees ; leaves evergreen. -P/ioradoKfro?!. 37 



25. Not parasitic ; leaves opposite or verticillate ,26 . 



25. Not parasitic; leaves alternate 37 . 

 26. Verv- low, trailing shrubs 27,. 

 26. Not as above 28 . 



27. Leaves evergreen, smooth and shining, entirely prostrate ; 



introduced I'n/ca. 97 



27. Leaves deciduous; flowering stems, 1-2 ft. high ; native. .. .E/w>iy»nis. 76 

 28. Leaves all deeply or slightly lobed 29 . 



28. Leaves lobed or wavy-toothed only on young shoots, the others en- 

 tire Syinphoi icarpus. 115 



28. Leaves entire or serrate, not lobed 30;. 



29. Fruit a double samara, in umbellate clusters or racemes Ari'r. 77 



29. Fruit a 1-seeded drupe, in flat cymes / 'ibniiiiivi. 114 



30. Leaves evergreen, coriaceous, sometimes in 3s or alternate Kahin'a. 91 



.'50. Leaves deciduous 31 . 



31. Leaves serrate; shrubs (32 . 



31. Leaves entire; shrubs or trees 33 . 



32. Fruit a drupe with soft pulp, in flat cymes / 'ibtninon. 114 



32. Fruit, a 2-valved pod, in upper axils or terminal Diertnlla. 116 



32. Fruit crowned with 2-4 diverging styles, in flat cymes Hydrangea. 59 



o2. Fruit a 3-5-lobed pod, seeds in a red aril; peduncles axillary . .y??/o;M'w«,?. 76 



33. Tree with very broad leaves ; pods elongated Catalpa. 109 



33. Small tree ; leaves ovate ; fruit a red drupe Corints. 89 



33. Shrubs, upright, spreading or twining 34 . 



