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Persian Silk Tree🌿
Albizia julibrissin
ネムノキ
A deciduous tall tree that produces fluffy pale pink flowers (clusters of stamens) in summer. It is notable for its nyctinastic leaf movement: the leaflets fold together at night, giving it the Japanese name "sleeping tree." Found along riverbeds, in parks, and by roadsides. As a legume, it harbors nitrogen-fixing bacteria in root nodules.
Identification Points
- ✓Bipinnately compound leaves with leaflets that fold together at night (nyctinasty)
- ✓Flowers in summer with numerous pink to white thread-like stamens
- ✓Produces legume pods (long, flat pods)
- ✓Bark is grayish-brown with horizontally elongated lenticels
Habitat
Riverbeds, roadsides, parks, and open woodlands
Season
June–August (flowers)
Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Compound
Venation
Pinnate
Leaf margin
Entire
Leaf shape
Ovate
Growth form
Tree
Evergreen/Deciduous
Deciduous
Petal count
5 petals
Petal fusion
Free
Flower color
Pink
Flowering season
Summer
Phylogenetic Positionマメ科 →
Phylogenetic Position
Angiosperms > Eudicots > Core eudicots > Fabales > Fabaceae
Divergence Era
Late Cretaceous to Paleogene (approx. 70–60 million years ago)
Evolution Notes
The legume family performs nitrogen fixation through symbiosis with rhizobia, enabling growth even in nutrient-poor environments.
View on evolution timeline →Sources & References
AI-generated, needs verification