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Japanese PrimroseπΈ
Primula sieboldii
γ΅γ―γ©γ½γ¦
A perennial herb growing in river floodplains and moist meadows. In spring, it produces pale pink to white flowers resembling cherry blossoms. A Japanese endemic species designated as the prefectural flower of Saitama. Once common on the Kanto Plain, it is now endangered.
Identification Points
- βFive petals, each deeply notched (resembling cherry blossoms)
- βFlowers pale pink to white with faint fragrance
- βLeaves ovate to elliptical with shallowly lobed margins and abundant soft hairs
Habitat
River floodplains and moist meadows
Season
AprilβMay (flowers)
Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Pinnate
Leaf dissection
Dissected
Leaf shape
Round
Growth form
Herb
Petal count
5 petals
Petal fusion
Fused
Flower color
Pink
Flowering season
Spring
Stipules
Absent
Flower symmetry
Actinomorphic
Plant sex
Hermaphrodite
Stamen count
3-4
Phylogenetic Positionγ΅γ―γ©γ½γ¦η§ β
Phylogenetic Position
Angiosperms > Eudicots > Core Eudicots > Ericales > Primulaceae
Divergence Era
Paleogene (ca. 50 million years ago)
Evolution Notes
Primula has evolved heterostyly (pin and thrum flower forms with differing style lengths), which prevents self-pollination.
View on evolution timeline βSources & References
AI-generated, needs verification