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Hairy Willowherb
Epilobium pyrricholophum
γ’γ«γγ
A perennial herb growing in moist meadows and waterside areas. The name 'Akabana' (red plant) derives from the stems and leaves turning red in autumn. Pale pink 4-petaled flowers bloom from summer to autumn, and the long pod-like capsules release wind-dispersed seeds with white plumes when ripe.
Identification Points
- βEntire plant turns vivid red in autumn
- βFlowers pale pink with 4 notched petals
- βFruit is an elongated capsule releasing white-plumed seeds for wind dispersal
Habitat
Waterside areas, moist meadows, and mountain streamsides
Season
JulyβSeptember (flowers)
Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Pinnate
Leaf margin
Serrate
Leaf shape
Linear
Growth form
Herb
Petal count
4 petals
Petal fusion
Free
Flowering season
Autumn
Habitat
Wetland
Aromatic
Aromatic
Stamen count
1-2
Phylogenetic Positionγ’γ«γγη§ β
Phylogenetic Position
Angiosperms > Eudicots > Core eudicots > Myrtales > Onagraceae
Divergence Era
Paleogene (about 60β50 million years ago)
Evolution Notes
Onagraceae flowers are fundamentally 4-merous. Plants in the family, such as fireweed (Chamerion), evolved as pioneer species of post-fire habitats.
View on evolution timeline βSources & References
AI-generated, needs verification