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Japanese Alderπ³
Alnus japonica
γγ³γγ
A deciduous tree in the birch family. Distributed across Japan, Korea, China, and the Russian Far East. Grows in lowland wetlands, swamps, and rice-paddy margins. Nitrogen-fixing root nodules allow it to thrive in poor or waterlogged soils. In winter, pendant catkins precede small pine-cone-like strobili. The rot-resistant wood was used for stakes and geta clogs. Also a notable source of seasonal allergens.
Identification Points
- βAlternate obovate leaves with shallow serrations
- βSmall pine-cone-like strobili
- βThrives in wetlands
Habitat
Wetlands, swamps, rice-paddy margins
Season
November to March (flowers)
Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Leaf shape
Ovate
Growth form
Tree
Evergreen/Deciduous
Deciduous
Habitat
Wetland
Phylogenetic Positionγ«γγγη§ β
Phylogenetic Position
Angiosperms > Eudicots > Fagales > Betulaceae
Divergence Era
Late Cretaceous to Paleogene
Sources & References
AI-generated, needs verification