Tree Species List #5 web version (ppt version)

ANGIOSPERMAE

Amentiferae

FAMILIES:

Platanaceae

key feature:

fruit: head of achenes

GENERA

Platanus
key feature:
same as family (one genus in this family)

AMENTIFERAE

FAMILIES

Fagaceae
key features:
involucre: (fused bracts) that partially or completely surrounds one or more nuts

GENERA

Fagus
key features

terminal buds: lanceolate

male ament: pendent, globose
involucre: bracts fused into short spines, surrounds several nuts

Castanea
key features

male ament: stiff, upright
terminal buds: small, not distinctive
involucre: bracts fused into long, branched spines, surrounds several nuts

Quercus
key features

male ament: standard form (pendent)
involucre: bracts fused into cap, partially surrounding one nut

terminal buds: clustered

 

SUBGENERA

white oaks
key features

• bark: soft, light colored
• leaves: rounded lobes
• vessels: closed in heartwood 

true white oaks: deep lobes
chestnut oaks: shallow lobes

red oaks
key features

• bark: hard, dark colored
• leaves: lobes with bristle tips
• vessels: open in heartwood

true red oaks: deep lobes
willow oaks: no lobes
live oaks: persistent leaves

GYMNOSPERMAE

FAMILIES

Taxodiaceae

key features:

cone: globose to oval with peltate cone scales branchlets: deciduous (leaves plus small twigs shed as a unit)

GENERA

Sequoiadendron

key features:

leaves: awl-shaped, several ranked

cones: 2-3 inches

Sequoia

key features:

leaves: linear, 2-ranked
cones: 1 inch

Taxaceae NOTE: NOT A CONIFER (no cones)

key features:

dioecious aril is female reproductive structure (seed surrounded by fleshy issue)

GENERA

Taxus
key feature: same as family