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Philadelphia Fleabane🌼
Erigeron philadelphicus
ハルジオン
An introduced perennial from North America, common along roadsides in spring. Closely resembles E. annuus but can be distinguished by its earlier flowering period (spring only), hollow stems, and cauline leaves that clasp the stem.
Identification Points
- ✓Stem is hollow in cross-section
- ✓Cauline leaves clasp (embrace) the stem
- ✓Buds droop downward
- ✓Ray florets are narrower and more numerous than E. annuus
Habitat
Roadsides, vacant lots, grasslands
Season
April to June (flowers)
3D Specimen Model
Kyushu University, Shikano Lab (CC0)
View on Sketchfab→Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Pinnate
Leaf margin
Serrate
Leaf shape
Ovate
Growth form
Herb
Petal count
5 petals
Petal fusion
Fused
Flower color
White
Flowering season
Spring
Habitat
Roadside
Ovary position
Inferior
Stamen count
1-2
Phylogenetic Positionキク科 →
Phylogenetic Position
Angiosperms > Eudicots > Core eudicots > Asterales > Asteraceae
Divergence Era
Late Cretaceous to Paleogene (approx. 80–70 million years ago)
Sources & References
AI-generated, needs verification