noun
Polygonum tenuicaule (species of knotweed)
A specific plant species; the name literally means 'spring tiger's tail'. Botanical term, rarely encountered outside specialist contexts.
春虎の尾は山地の日陰に生える多年草です。
Polygonum tenuicaule is a perennial plant that grows in shady mountain areas.
Standard kanji spelling for this plant name.
Variant spelling without の; less common but still used.
The name is composed of 春 (spring), 虎 (tiger), and 尾 (tail), likely referring to the plant's appearance or blooming season. The exact derivation is uncertain.