1. 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

2. pignut hickory Carya glabra (Juglandaceae)

3. Carya glabra

4. shagbark hickory Carya ovata (Juglandaceae)

5. sand hickory Carya pallida (Juglandaceae)

6. mockernut hickory Carya tomentosa (Juglandaceae)

7. Carya tomentosa

8. black walnut Juglans nigra (Juglandaceae)

9. black walnut Juglans nigra (Juglandaceae)

10. butternut (a.k.a. white walnut) Juglans cinerea (Juglandaceae)

11. 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

12. green ash Fraxinus pennsylvanica (Oleaceae)

13. Fraxinus pennsylvanica

14. white ash Fraxinus americana (Oleaceae)
Like green ash except:
Bud sits inside the leaf scar
Wings on samaras extend farther down the seed cavity
Seed cavity is fat and round
Found on more upland sites
Only native to the Piedmont in DE
The BEST wood for baseball bats

15. 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

16. fringetree Chionanthus virginicus (Oleaceae)

17. 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

18. horse chestnut
Aesculus hippocastanum