Watson, Thomas, Braintree, Mass., _Ilex opaca_, on estate of 139 Whistlewood (Acer Pennsylvanicum, L.) 149-151 White ash (Fraxinus Americana, L.) 162-164 birch (Betula papyrifera, Marsh.) 68-70 (Betula populifolia, Marsh.) 66-68 cedar (Cupressus thyoides, L.) 25, 26 (Thuja occidentalis, L.) 23, 24 elm (Ulmus Americana, L.) 95-97 hickory (Carya porcina, Nutt.) 53-55 maple (Acer rubrum, L.) 140-142 (Acer saccharinum, L.) 142-144 mulberry (Morus alba, L.) 104 oak (Quercus alba, L.) 75-77 pine (Pinus Strobus, L.) 4-6 poplar (Populus alba, L.) 39, 40 spruce (Picea alba, Link) 16-18 willow (Salix alba) 43, 45, 46 White-heart hickory (Carya tomentosa, Nutt) 51-53 Whitewood (Liriodendron Tulipifera, L.) 104-106 Whitewood (Tilia Americana, L.) 153-155 Wild plum (Prunus Americana, Marsh.) 171 (Prunus nigra, Ait.) 122, 123, 171 red cherry (Prunus Pennsylvanica, L. f.) 124, 125 Willow family. (=Salicaceae=) 28-46 Willow, Black willow (Salix nigra, Marsh.) 42, 43 Crack, Brittle willow. (Salix fragilis, L.) 43-45 Pussy willow, Glaucous willow (Salix discolor, Muhl.) 40, 41, 171 White willow. (Salix alba, L., _var._ vitellina, Koch) 45, 46 Witch hazel family. (=Hamamelidaceae=) 108, 109 Y Yellow birch. (Betula lutea, Michx. f.) 63, 64 oak. (Quercus velutina, Lam.) 89-91