Japanese name: クサタチバナ（草橘） Scientific name:Vincetoxicum acuminatum
[Overview]
A perennial 30–60 cm tall, found in grasslands and forests in the mountains.
The stem is green and unbranched.
Leaves are simple and opposite, ovate to oblong-elliptic, 5–13 cm long and 3–6 cm wide, with fine hairs on the veins on both surfaces.
The leaf margins are entire.
The petiole is 0.5–1.6 cm long.
Cymes arise from the leaf axils; the inflorescences have long stalks and gather at the stem tip.
The flowers are star-shaped, 2 cm across, and white.
The flower stalk is 1–3 cm long.
The fruit is a follicle 4–6 cm long, which splits open when ripe, releasing seeds with long white hairs.
