Tree Species List #4 (new web version) (powerpoint version)

ANGIOSPERMAE

Floriferae

Polypetale 

FAMILIES

Lauraceae
key features: strong aromatic compounds in leaves, stems, roots; fruit a one-seeded berry or drupe

GENERA

Umbellularia
key features

leaves: persistent, elliptical, entire
crown architecture: deliquescent

Sassafras
key features

leaves: deciduous, polymorphic (elliptical, mitten-shaped, 3-lobed), entire
crown architecture: excurrent

Fabaceae

key features

fruit: legume

GENERA

Robinia
key features:

inflorescence: racemes
leaves: pinnately compound

twigs: stipular thorns

bark: ropey

Sympetale:

key features:

flowers: complete
corolla: fused

FAMILIES

Oleaceae
key features: none

GENERA

Fraxinus
key features:

leaves: opposite pinnately compound

fruit: samaras in panicles

Apetalae

key features:

FAMILIES

Ulmaceae

key features:

no key features

GENERA

Ulmus
key features:

leaves: elliptical, doubly serrate leaf with asymmetrical leaf base
fruit: samara with wing completely encircling the seed

Floriferae

FAMILIES

Magnoliaceae

key features:

twigs: circular stipular scars
buds: large and terminal (vegetative and reproductive)
flowers and fruits: large and terminal

GENERA

Magnolia
key features:

leaves: elliptical
fruit: aggregate of folicles

Liriodendron
key features:

leaves: 4-lobed, truncate

fruit: aggregate of samaras

Ericaceae

key features:

corolla: fused

GENERA

Arbutus
key features:

bark: thin red/green exfoliating

leaves: persistent for 1 year

Tiliaceae

key features:

no key features

GENERA

Tilia
key features:

leaves: cordate

fruit: elongate bract fused to stalk of cluster of fruit