Transcript black walnut Juglans nigra (Juglandaceae)

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