Tree Species List #1 (web version) (powerpoint version)

ANGIOSPERMAE

 Key features: seeds protected in ovary, flowers, and fruits; vessels conduct water

Floriferae:

Polypetale:

FAMILIES:

Aceraceae
key features: none

GENUS

Acer
key features:

leaves: opposite leaves (most palmately lobed)

fruit: double samara

 

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GYMNOSPERMAE

Key features: unprotected seeds, no flowers or fruits, tracheids conduct water.

Conifers:
key features: cones

FAMILIES

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

GENERA

Abies
key features:

buds: cruciform
leaves: persistent, linear, sessile with notched apex; smooth, circular leaf scars on twigs;
mature female cone: upright, shatter when mature, leathery

Tsuga
key features:

leaves/twigs/buds: persistent, linear, petiolate leaves; small sterigmata
mature female cone: pendant, 1-3", leathery

Cupressaceae

key features:
scale-like leaves

GENERA

Thuja
key features:

leaves: scale-like, decussate, lateral leaves curved inward branchlets: flattened, planar foliage cones (scales): oblong, leathery, several fertile cone scales (basal cone scale attachment)

Chamaecyparis
key features:

leaves: scale-like, decussate, lateral leaves pointed
branchlets: flattened, planar foliage cones (scales): globose, leathery (peltate cone-scale attachment)

Pseudotsuga
key features:

leaves: persistent, linear, petiolate, lemon aroma twigs: VERY small sterigmata buds: reddish brown, lanceolate
mature female cone: pendant, leathery bracts: 3-lobed exserted .