Tree Species List #3 web version (powerpoint version)

ANGIOSPERMAE

Amentiferae:
key feature: inflorescence is ament (monoecious or dioecious)

FAMILIES

Juglandaceae
key features: pinnately compound, alternate leaves; highly modified female ament (fruit with husk)

GENERA

Juglans
key features

male ament: single
fruit (mature female ament) husk: leathery indehiscent shell: corrugated

pith: chambered

Carya
key features:

male ament: groups of 3's
fruit (mature female ament) husk: woody dehiscent shell: smooth

pith:solid

FLORIFERAE

POLYPETALAE

FAMILIES

Hippocastanaceae:
key features: use genus characteristics

GENERA

Aesculus
key features:

leaves: opposite, palmately compound
flowers: showy panicles
fruit: a capsule with large brown seed

Cornaceae
key features: none

GENERA

Cornus
key features:

Rosaceae
key features: variable, flowers generally with 5 unfused petals

GENERA

Sorbus
key features:

leaves: variable (simple, pinnately compound)
fruit: pome

Prunus
key features:

leaves: simple, extrafloral nectary fruit: drupe

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GYMNOSPERMAE

Conifers:
key features: cones

FAMILIES

Pinaceae

key features: bract and cone-scale distinct, flattened; terminally winged seeds

GENERA

Cedrus
key features:

leaves: persistent acicular leaves on short shoot;

cones: upright

Picea
key features:

leaves: persistent, acicular or linear, sessile, acuminate

twigs: twigs with prominent sterigmata

cones: pendent, leathery with entire or wavy scales