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Ruppia
Ruppia maritima
ホッスモ
A submerged perennial aquatic plant growing in saline wetlands, brackish lakes, and intertidal zones in Japan. Stems are slender and thread-like, with extremely narrow linear leaves. Pollination occurs underwater or at the water surface. Distribution is localized nationwide and sensitive to environmental changes.
Identification Points
- ✓Submerged plant growing in saline wetlands and brackish waters
- ✓Stems and leaves are thread-like and slender
- ✓Flowers emerge near the water surface, pollinated by wind or water
Habitat
Brackish lakes, saline wetlands, and inlets
Season
May–October (flowers)
Morphological TraitsAI-estimated, needs verification
Growth form
Herb
Leaf shape
Linear
Habitat
Aquatic
Leaf type
Simple
Venation
Pinnate
Petal fusion
Free
Stipules
Absent
Leaf dissection
Undivided
Flower symmetry
Actinomorphic
Ovary position
Superior
Plant sex
Hermaphrodite
Phylogenetic Positionホッスモ科 →
Phylogenetic Position
Angiosperms > Monocots > Alismatales > Ruppiaceae
Divergence Era
Paleogene (ca. 50 Ma onwards)
Evolution Notes
Ruppiaceae is a submerged plant specialized for saline waters, having undergone secondary adaptation from terrestrial ancestors to aquatic and brackish environments. Molecular phylogenetics places it close to Potamogetonales.
View on evolution timeline →Sources & References
AI-generated, needs verification