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Water-plantain family
Alismataceae
オモダカ科
A monocot family of aquatic or semi-aquatic plants. Sagittaria and Alisma are native to Japan, found in rice paddies and ponds. Leaves are sagittate (Sagittaria) or elliptical, and flowers typically have 3 white petals.
Key Characteristics
- ●Aquatic or semi-aquatic herbs
- ●3 petals and 3 sepals
- ●Aggregate fruit of numerous achenes
- ●Basal leaves variable: sagittate, cordate, or elliptical
Morphological Traits
A family may include species with different trait values — multiple values indicate the range within the family.
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Parallel / Pinnate / Palmate
Leaf margin
Entire
Growth form
Herb
Evergreen/Deciduous
Deciduous
Latex
Present
Flower symmetry
Actinomorphic
Petal count
6 petals
Ovary position
Superior
Stamen count
3-4
Plant sex
Dioecious / Hermaphrodite / Monoecious
Phylogenetic Position
Angiosperms > Monocots > Alismatales > Alismataceae
Divergence Era
Paleogene (ca. 60–50 Ma)
Representative Genera
Related Evolution Events
- ・Adaptation to aquatic environments and evolution of diverse leaf shapes
- ・Emergence of weedy species that expanded with rice paddy agriculture
Plants in Water-plantain family on this site
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