Spines of Paragon chestnut bur, 103 31. Paragon chestnut, 104 32. Four-year-old Paragon chestnut tree, 105 33. Open bur of the Ridgely chestnut, 106 34. Japan Giant chestnut, 110 35. Spines of Japan chestnut, 110 36. Chestnut weevil, 114 37. Large filbert, 119 38. Large seedling hazelnut, 120 39. Constantinople hazel, 129 40. English filbert orchard, five years from seed, 134 41. Varieties of filberts and hazel seedlings, 135 42. Extra large hazel seedling or round English filbert, 136 43. Filbert orchard struck with blight, fifth year from seed,137 44. Hazel fungus, 141 45. Fourteen-years-old pecan tree in Mississippi, 154 46. Leaf and sterile catkins of shellbark hickory, 156 47. Western shellbark, 158 48. Section Western shellbark, 158 49. Leaf of pignut, 161 50. Bitternut branch and leaf, 163 51. Bitternut, 164 52. Large, long pecan nut, 166 53. Oval pecan nut, 166 54. Small oval pecan nut, 167 55. Little Mobile pecan nut, 167 56. Stuart pecan nut, 169 57. Van Deman pecan nut, 169 58. Risien pecan nut, 169 59. Lady Finger pecan nut, 169 60. The original Hales' Paper-shell hickory tree, 171 61. Hales' hickory, 172 62. Section of Hales' hickory, 172 63. Long shellbark hickory, 173 64. Shellbark Missouri, 173 65. Long Western shellbark, 174 66. Fresh Nussbaumer hybrid, 175 67. Nussbaumer's hybrid, 176 68. Crown grafting on roots of the hickory, 189 69. Sprouts from severed hickory roots, 190 70. The hickory-twig girdler, 196 71. Hickory borer, 198 72. Burrows of hickory scolytus, 200 73.