xvi LIST OF ILLUSTRATIONS 



no. PACW 



11. Branch of Western larch showing leaves and cone with 



protruding bracts 189 



12. Branch and cones of red spruce 191 



13. Twig and stalked cone of Eastern hemlock 193 



14. Twig and sessile cone of Western hemlock 193 



15. Twig and cone of white fir 194 



16. Twig and cone of Douglas fir or Oregon pine; showing 



protruding bracts 195 



17. Branch, flower, and cone of the redwood 197 



18. Branch and cone of bald cypress 199 



19. Branch and fruit of red cedar 200 



20. Nut with and without husk, flowers, and compound 



leaf of black walnut 203 



21. Compound leaf, bud, fruit, and flower of shagbark 205 



22. Leaf, flowers, and fruit of trembling aspen 207 



23. Leaf, flowers, and fruit of big tooth aspen 207 



24. Leaf, flower, and fruit of white willow 209 



25. Leaves, flower, and fruit of yellow birch 211 



26. Leaf and flower of paper birch 211 



27. Leaves and burrs of American beech 213 



28. Leaf, flower, burr, and nut of chestnut 215 



29. Leaf and acorn of red oak 217 



30. Leaf, flower, and fruit of white oak 219 



31. Leaf and fruit of valley oak 219 



32. Flower, fruit, and leaf of American elm 221 



33. Leaf, flower, and fruit of sweet bay 223 



34. Leaf, bud, flower, and fruit of tulip poplar 225 



35. Leaf, bud, and fruit of sycamore 227 



36. Compound leaf and fruit of black locust 229 



37. Leaf, flower, and fruit of mesquite 230 



38. Leaf, flower, and fruit of sugar maple 233 



39. Leaf, flower, and fruit of red maple 234 



40. Leaf (compound), flower, and fruit of box elder 235 



41. Leaf, flower, fruit, and bud of basswood 237 



42. Leaf, flower, and fruit of white ash 239 



43. Terminal branch, showing leaves, flower, and fruit 



of juniper 242 



