Japanese name: ナンブトラノオ（南部虎尾） Scientific name:Bistorta hayachinensis
[Overview]
A perennial 10–30 cm tall, found on serpentine ground in the alpine zone of Mt. Hayachine.
It often forms communities with Hayachine-usuyukiso and other plants on sandy and gravelly ground.
It has a thick, short rhizome.
The leaves consist of basal leaves and stem leaves; several basal leaves appear, 4–11 cm long, ovate and entire, glossy on the upper surface, with unwinged petioles.
The stem leaves are small and ovate, with very short petioles.
A pseudoraceme 1–3 cm long at the stem tip bears densely packed flowers.
In autumn it often produces long-stalked inflorescences from the leaf axils.
The pale reddish purple calyx is conspicuous and petal-like.
The fruit is an achene enclosed in the calyx, elliptic with 3 ridges.
[Cultivation]
Propagate from seed or by division.
It prefers a sunny, well-drained site, but strong direct sunlight in summer can weaken it, so a cool, airy place with partial shade is suitable in summer.
From spring to autumn, water thoroughly when the soil surface dries; in winter, water so that the soil does not dry out completely.
In spring, apply slow-release fertilizer placed on the soil.
There are no particular pests or diseases.
