=Z.= Leaves distinctly straight-veined, thin 90. _Fagus._ =Z.= Leaves thick, obtuse; fruit an acorn 88. _Quercus._ =Z.= Leaves 6 in. or more long; crushed leaves with a rank, fetid odor 5. _Asimina._ =Z.= Leaves 3-5 in. long; twigs and leaves very spicy; shrub rather than tree 70. _Lindera._ =Z.= Leaves about 2 in. long, oval, on twigs which have ridges extending down from the sides of the leafstalk; small tree, almost a shrub, with beautiful flowers 43. _Lagerstroemia._ =Z.= Leaves not as above. (=a.=) =a.= Fruit a large (½-1½ in.) rounded pulpy berry with a heavy calyx at the base 55. _Diospyros._ =a.= Fruit small (¼ in.), fleshy, drupe-like, with a striate stone; limbs branching horizontally, often descending 46. _Nyssa._ =a.= Fruit a black, juicy berry (1/3-½ in.), with about 3 seeds 20. _Rhamnus._ =a.= Fruit an ovoid dry drupe (½ in.); leaves sweet-tasting 59. _Symplocos._ =a.= Fruit an apple-like pome (Quince) 37. _Pyrus._ =b.= Wood soft; both kinds of flowers in catkins in spring; with either stipules or stipular sears 91. _Salix._ =b.= Wood hard; leaves thick; fruit an acorn 88. _Quercus._ =c.= Fruit a 2-4-seeded small berry; juice not milky 20. _Rhamnus._ =c.= Fruit large, orange-like in size and color when ripe; juice milky 77. _Maclura._ =c.= Fruit small, black when ripe, cherry-like; juice milky 54. _Bumelia._ =d.= Aromatic; berries dark blue on red stalks 68. _Persea._ =d.= Not aromatic; leaves nearly 1 ft. long; flowers large and solitary. 1. _Magnolia._ =d.= Not aromatic; leaves 1-4 in. long; flowers very small; fruit small dark-colored berries, with 2-4 seeds 20. _Rhamnus._ =d.= Not aromatic; flowers large, in showy clusters. (=e.=) =e.= Leaves 5 in. or more long 52. _Rhododendron._ =e.= Leaves less than 4 in. long 51. _Kalmia._ =f.= Leaves decidedly aromatic, usually somewhat irregularly lobed, margin entire, base tapering 69. _Sassafras._ =f.= Leaves usually deltoid, sometimes heart-shaped with serrate margin and gummy buds, rarely palmately lobed. All have either the petiole flattened sidewise, the leaf-blade densely silvery-white beneath, or gummy aromatic buds 92. _Populus._