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Plane-tree family🌳
Platanaceae
スズカケノキ科
A small family containing only the genus Platanus (plane trees/sycamores). Disjunctly distributed across North America, the eastern Mediterranean, and East Asia. Widely used as street trees worldwide.
Key Characteristics
- ●Bark peels off in plates, creating a camouflage-like pattern
- ●Large palmately lobed leaves
- ●Spherical aggregate fruit (globose head)
- ●Unisexual flowers; wind-pollinated
Morphological Traits
A family may include species with different trait values — multiple values indicate the range within the family.
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Pinnate / Palmate
Leaf margin
Dentate
Growth form
Tree
Evergreen/Deciduous
Deciduous
Leaf dissection
Dissected
Stipules
Present
Flower symmetry
Actinomorphic
Petal count
3 petals / 4 petals / 6 petals / Many
Petal fusion
Free
Ovary position
Superior
Stamen count
3-4
Plant sex
Monoecious
Phylogenetic Position
Angiosperms > Eudicots > Proteales > Platanaceae
Divergence Era
Cretaceous (approx. 100 million years ago onward)
Representative Genera
Related Evolution Events
- ・An ancient lineage among basal eudicots
- ・Fossil record extends back to the Cretaceous