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Frogbit family
Hydrocharitaceae
トチカガミ科
An aquatic monocot family. Hydrocharis, Ottelia, and Hydrilla are native to Japan, found in ponds, rivers, and rice paddies. Includes diverse species adapted to freshwater, brackish, and marine environments with various growth forms.
Key Characteristics
- ●Adapted to a wide range of aquatic environments from freshwater to seawater
- ●Diverse growth forms: submerged, floating, and emergent
- ●3 petals and 3 sepals
- ●Many species pollinated by water (hydrophily) or at the water surface
Morphological Traits
A family may include species with different trait values — multiple values indicate the range within the family.
Leaf arrangement
Alternate / Opposite / Whorled
Leaf type
Simple
Venation
Parallel / Pinnate / Palmate
Leaf margin
Entire
Growth form
Herb
Evergreen/Deciduous
Deciduous
Leaf dissection
Undivided
Stipules
Present / Absent
Flower symmetry
Actinomorphic
Petal count
3 petals / 6 petals
Ovary position
Inferior
Stamen count
1-2
Plant sex
Dioecious / Monoecious
Phylogenetic Position
Angiosperms > Monocots > Alismatales > Hydrocharitaceae
Divergence Era
Paleogene (ca. 60–55 Ma)
Representative Genera
Related Evolution Events
- ・Secondary adaptation from freshwater to marine environments
- ・Evolution of water pollination (hydrophily)
Plants in Frogbit family on this site
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