noun
water pepper (Persicaria hydropiper)
A plant species; also known as ヤナギタデ (柳蓼).
See also: 柳蓼 (やなぎたで)
ミズタデは湿地に生える一年草です。
Water pepper is an annual plant that grows in wetlands.
Synonym; ヤナギタデ is another common name for the same plant, while ミズタデ is the more frequently used kana form.
Compound of 水 (mizu, 'water') and 蓼 (tade, 'knotweed, smartweed'). The exact derivation is uncertain, but the name likely refers to its habitat.