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Euptelea
Euptelea polyandra
フサザクラ
A deciduous small tree growing along mountain ravines. In spring, clusters of red stamens hang beautifully before the leaves emerge. It possesses a primitive flower structure lacking petals and sepals. Eupteleaceae is a small family of only 1 genus and 2 species.
Identification Points
- ✓Red stamens hang in clusters before leaf emergence in spring
- ✓Flowers lack petals and sepals
- ✓Leaves ovate with irregular serrations, alternate
Habitat
Along mountain ravines and in valleys
Season
March–April (flowers), October–November (autumn color)
Morphological TraitsAI-estimated, needs verification
Growth form
Tree
Evergreen/Deciduous
Deciduous
Leaf arrangement
Alternate
Leaf margin
Serrate
Habitat
Mountain
Leaf type
Simple
Venation
Pinnate
Petal fusion
Free
Stipules
Absent
Leaf dissection
Undivided
Ovary position
Superior
Phylogenetic Positionフサザクラ科 →
Phylogenetic Position
Angiosperms > Basal eudicots > Eupteleales > Eupteleaceae
Divergence Era
Early to Middle Cretaceous (approx. 110 million years ago)
Evolution Notes
Eupteleaceae is a basal angiosperm family closely related to Ranunculales; its primitive apetalous flowers are important for studying pollination modes.
View on evolution timeline →Sources & References
AI-generated, needs verification