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Download black walnut Juglans nigra (Juglandaceae)
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Juglandaceae (the walnut family) • 8 genera, 60 species in the world- trees •Primarily Northern temperate region with a few extending into South America • Leaves: alternate, pinnately compound, estipulate, aromatic •Plants: monoecious; Flowers: imperfect, petals absent •Staminate inflorescence: catkin-like raceme or spike •Pistillate inflorescence: solitary flower or spike • Fruit: drupe or nut, husked • Many important timber trees pignut hickory Carya glabra (Juglandaceae) Carya glabra shagbark hickory Carya ovata (Juglandaceae) sand hickory Carya pallida (Juglandaceae) mockernut hickory Carya tomentosa (Juglandaceae) Carya tomentosa black walnut Juglans nigra (Juglandaceae) black walnut Juglans nigra (Juglandaceae) butternut (a.k.a. white walnut) Juglans cinerea (Juglandaceae) Oleaceae (the olive family) • 24-30 genera; 600 species; cosmopolitan •Herbs, shrubs, woody vines or trees •Leaves: generally opposite, simple or compound, estipulate •Plants: monoecious Flowers: perfect or imperfect •Fruit: berry, drupe, capsule, schizocarp, nut or samara • Produce timber and olives • Ornamentals include lilac and Forsythia green ash Fraxinus pennsylvanica (Oleaceae) Fraxinus pennsylvanica white ash Fraxinus americana (Oleaceae) Like green ash except: 1. Bud sits inside the leaf scar 2. Wings on samaras extend farther down the seed cavity 3. Seed cavity is fat and round 4. Found on more upland sites 5. Only native to the Piedmont in DE 6. The BEST wood for baseball bats Delaware’s Two Ashes green ash white ash Buds On top of leaf scar Sit in leaf scar Seed Cavity Flat Round Samara wings Stop at top of cavity Come down cavity Habitat Riparian areas Upland sites fringetree Chionanthus virginicus (Oleaceae) Hippocastanaceae (the buckeye family) • 2 genera; 16 species; shrubs or trees • Temperate regions of Asia, Europe, and North America to the tropics of southeast Asia and northern S. America • Leaves: Opposite, palmate, estipulate • Plants: monoecious Flowers: perfect, paniculiform cyme, petals distinct • Nectary disc present, small • Fruit: capsule with large seeds, often only 1-2 seeds maturing horse chestnut Aesculus hippocastanum
