Image: Wikimedia Commons (See link for license)
Brazilian Waterweed
Egeria densa
オオカナダモ
A submerged aquatic plant of the Hydrocharitaceae family native to South America, naturalized and proliferating in ponds and waterways throughout Japan. Its long, narrow leaves are arranged in whorls along the stem.
Identification Points
- ✓葉は線形で3〜6枚輪生
- ✓白い3弁の花が水面に浮く
- ✓茎は分枝し沈水
Habitat
池沼・水路・河川（帰化）
Season
5〜10月（花）
3D Specimen Model
Kyushu University, Shikano Lab (CC0)
View on Sketchfab→Morphological TraitsAI-estimated, needs verification
Growth form
Herb
Leaf type
Simple
Leaf dissection
Undivided
Flower symmetry
Actinomorphic
Ovary position
Inferior
Stamen count
1-2
Phylogenetic Positionトチカガミ科 →
Phylogenetic Position
Angiosperms > Monocots > Alismatales > Hydrocharitaceae
Divergence Era
Paleogene (ca. 60–55 Ma)
Sources & References
🤖Claude AI
AI-generated, needs verification