Gleditsia triacanthos, L. _Honey locust_ 129, 130 Gray birch. (Betula lutea, Michx. f.) 63,64 (Betula populifolia, Marsh.) 66-68 pine. (Pinus Banksiana, Lam.) 8, 9 Green ash. (Fraxinus Pennsylvanica, _var._ lanceolata, Sarg.) 166, 172 osier. (Cornus alternifolia, L. f.) 157, 158 Groome estate, Dorchester, Mass., Willow. (_Salix fragilis_, 1890) 44 Gum, (Liquidambar Styraciflua, L.) 108, 109 Sour gum. (Nyssa sylvatica, Marsh.) 159, 160 H Hackberry. (Celtis occidentalis, L.) 100-102 Hacmatack. (Larix Americana, Michx.) 2-4 =Hamamelidaceae.= (Witch Hazel family) 108, 109 Liquidambar styraciflua, L. _Sweet gum_ 108, 109 Hard maple. (Acer Saccharum, Marsh.) 144-146 pine. (Pinus rigida, Mill.) 6, 7 Hemlock. (Tsuga Canadensis, Carr.) 19, 20 Hickory. Bitternut, Swamp hickory. (Carya amara, Nutt.) 55-57 Mockernut, White-heart hickory. (Carya tomentosa, Nutt.) 51-53 Pignut, White hickory. (Carya porcina, Nutt.) 53-55 Shagbark, Shellbark hickory. (Carya alba, Nutt.) 49-51 Hicoria alba, Britton. _Mockernut, White-heart hickory, Walnut_ 51-53 glabra, Britton. _Pignut, White hickory_ 53-55 minima, Britton. _Butternut, Swamp hickory_ 55-57 ovata, Britton. _Shagbark, Shellbark hickory, Walnut_ 49-51 Holly family. (=Aquifoliaceae=) 138-140 Holly, American holly. (Ilex opaca, Ait.) 138-140 Honey locust. (Gleditsia triacanthos, L.) 129,130 Honeysuckle family. (=Caprifoliaceae=) 168,169 Hoop ash. (Celtis occidentals, L.) 100-102 (Fraxinus nigra, Marsh.) 167, 168 Hop hornbeam. (Ostrya Virginica, Willd.) 57,58 Hornbeam. (Carpinus Caroliniana, Walt.) 59, 60 Horse plum. (Prunus nigra, Ait.) 122,123 I Ilex opaca, Ait. _American holly_ 138-140 Ironwood. (Carpinus Caroliniana, Walt.) 59, 60 (Ostrya Virginica, Willd.) 57, 58 Ivy, Poison ivy. (Rhus toxicodendron) 137 J Jack pine. (Pinus Banksiana, Lamb) 8, 9 =Juglandaceae.= (Walnut family) 47-57 Carya alba, Nutt. _Shagbark, Shellbark hickory, Walnut_ 49-51 amara, Nutt. _Bitternut, Swamp hickory_ 55-57 porcina, Nutt. _Pignut, White hickory_ 53-55 tomentosa, Nutt. _Mockernut, White-heart hickory. Walnut_ 51-53 Hicoria alba, Britton _Mockernut, White-heart hickory. Walnut_ 51-53 glabra, Britton. _Pignut, White hickory_ 53-55 minima, Britton. _Bitternut, Swamp hickory_ 55-57 ovata, Britton. _Shagbark, Shellbark hickory, Walnut_, 49-51 Juglans cinerea, L. _Butternut, Oilnut, Lemon walnut_, 46, 47 nigra, L. _Black walnut_ 48, 49 June-berry. (Amelanchier Canadensis, Medic.) 116, 117 Juniper. (Larix Americana, Michx.) 2-4 Juniperus Virginiana, L. _Red cedar, Savin_ 26-28 L Labrador spruce. (Picea alba, Link) 16-18 Laconia, N.H., Pussy willow, 35 ft. high. (Salix discolor, Muhl.) 41 Larch. (Larix Americana, Michx.) 2-4