Lab 4 Trees

Bark: orangish, look at the roots because they will be orange as well; shrublike

Leaves: Looks like the TinkerBell leaf; younger plants have thorns

Fruits: Look like jackfruit

Family: Moraceae

Genus: Maclura

Species: pomifera

Common: Osage-orange

Bark: Smooth for many years, then develops thin ridges and furrows

Leaf: Deep sinuses, mostly hairless, 5-9 lobes with bristle tips

Fruit: acorn with ‘beret’ cap, reddish appressed scales

Family: Fagaceae

Genus: Quercus

Species: palustris

Common: Pin Oak

Bark: branches and bark have large, reddish thorns—be mindful of thornless varieties

Leaf: bi-pinnately compound, ovate leaflets with no serration

Fruit: long pod-like, twists

Family: Fabaceae

Genus: Gleditsia

Species: triacanthos

Common: Honey Locust

Bark: Scaly when young, blocky when mature—>looks like white oak, but no exfoliation

Leaf: cross-shaped, bottom covered in fine hairs

Fruit: acorn that looks like a balloon with a bowl shaped cap covering half of it

Family: Fagaceae

Genus: Quercus

Species: stellata

Common: Post Oak

Bark: light gray, as tree ages the bark up higher begins to exfoliate, remains blocky at the base

Leaf: narrow sinuses, no bristle tips

Fruit: acorn, long ovoid, cap covers ¼ of the nut

Family: Fagaceae

Genus: Quercus

Species: alba

Common: White Oak

Bark: ski trails don’t go all the way to the bottom

Leaf: pointed lobes, with deep rounded sinuses

Fruit: “pixie hat” covers half of nut; tip of the acorn may have concentric rings, cap looks like Hershey’s kiss

Family: Fagaceae

Genus: Quercus

Species: coccinea

Common: Scarlet Oak

Bark: Grey elephant skin bark, zigzag twigs

Leaf: Ovular with sharp serrations, tan dead leaves stay on the tree through winter

Fruit: pair of nuts in spiny husk, edible

Family: Fagaceae

Genus: Fagus

Species: grandifolia

Common: American Beech

Bark: Grey brown, highly variable

Leaf: Distinct star shaped leaves

Fruit: Gumballs

Family: Altingiaceae

Genus: Liquidambar

Species: styraciflua

Common: Sweetgum

Bark: Black bark with white ski trails extending all the way to the base of the tree

Leaf: Many toothed bristle tipped lobes, shallow sinuses

Fruit: Ovulate acorn with flat, beret cap

Family: Fagaceae

Genus: Quercus

Species: rubra

Common: Northern Red Oak

Bark: Naked terminal bud, shrub

Leaf: leaves wider at the apex than the base, alternate, smells like pepper when crushed

Fruit: looks like mango, edible

Family: Annonaceae

Genus: Asimina

Species: parviflora

Common: Smallflower pawpaw

Bark: Fuzzy valuate buds, spongy bark, shrub

Leaf: A bit circular, shiny on the top, covered in rusty hairs on the bottom, opposite

Fruit: Clusters on small white flowers, black drupe

Family: Viburnaceae

Genus: Viburnum

Species: rufidulum

Common: Rusty Blackhaw

Bark: blocky, nearly black

Leaf: 5-7 bristle tipped lobes, smooth topside, hairy underneath

Fruit: Small oval shaped acorn with fuzzy, loose scales on the cap

Family: Fagaceae

Genus: Quercus

Species: velutina

Common: Black Oak