Leaves: alternate, pinnately compound, leaflets short-stalked or nearly sessile

Twigs: stout, pubescent, pith chambered

Fruit: nut, thick and irregularly grooved husk

Habit: decurrent tree

Leaves: alternate, pinnately or bipinnately compound, no end leaflets

Twigs: slender and armed with thorns

Bark: grey and deeply furrowed and has thorns

Fruit: legume

Habit: large tree

Leaves: needles in fascicles of 5

Bark: smooth, greenish becoming dark gray and fissured into broad scaly ridges

Reproductive Structre: long, narrow seed cones

Notes: Michigan state tree

Habit: large excurrent tree

Leaves: needles in fascicles of 2, snap when bent double

Buds: reddish brown with loose scales

Bark: reddish, shallow fissures and broad, flat, flaky ridges

Reproductive Structre: seed cone

Habit: small to medium excurrent tree

Leaves: scalelike in pairs, opposite, 4-ranked, appressed

Bark: long shredded strips

Reproductive Structure: small seed cone, scales and bracts fused, cones are woody/leathery forming a rosette of thin, fused scale/bracts

Habit: medium decurrent tree

Leaves: alternate, pinnately compound

Buds: naked and minute, flanked by two spines

Fruit: legume

Habit: small decurrent tree/shrub

Leaves: alternate, pinnately compound (13-17 oval leaflets), margins sharply serrate

Buds: large and gummy

Bark: smooth and brown with conspicuous lenticels

Fruit: pome

Leaves: linear, 4-sided, sessile on peg, spirally arranged but lower leaves curve upwards

Twigs: smooth except for pegs

Reproductive Structure: seed cone, pendant, scale margins entire

Habitat: mainly dry upland sites

Habit: medium decurrent tree

Leaves: opposite, pinnately compound, leaflets sessile with pubescent petiolules

Buds: uppermost set of lateral buds set down from terminal bud

Bark: gray and corky

Fruit: single samara

Habitat: fertile, wet soils

Habit: small decurrent tree or large shrub

Leaves: opposite, simple, palmately lobed, 3 lobes, pubescent below

Buds: pubescent, valvate, stalked

Fruit: paired samara, wings divergent

Habit: decurrent shrub

Leaves: opposite, simple, palmately lobed, entire or sparsely toothed, petioles grooved and glandular

Buds: green and valvate

Fruit: red edible drupe (cranberry)

Habit: medium exurrent/columnar tree

Leaves: alternate, simple, rhombic to ovate, petioles laterally compressed

Buds: conical and slightly angled

Fruit: none-all trees male

Habit: small to medium excurrent tree

Leaves: neeles in fascicles of 2, short and divergent, not twisted

Buds: pale brown

Bark: reddish brown to dark gray with scaly ridges

Reproductive Structure: seed cone, serotinous and incurved