water pepper (Persicaria hydropiper f. aquaticum)
A specific aquatic form of water pepper. Cross-referenced with 柳蓼 (やなぎたで), a related plant.
See also: ヤナギタデ (やなぎたで)
Water pepper is an annual plant that grows in wetlands.
Standard kanji spelling for this plant name.
Katakana spelling, often used for plant names in scientific or field-guide contexts.
The name 川蓼 literally means 'river smartweed', reflecting its habitat. The exact historical derivation is uncertain.