Japanese name: ミヤマアカバナ（深山赤花） Scientific name:Epilobium hornemannii subsp. hornemannii
[Overview]
A perennial 5–25 cm tall, found along subalpine to alpine streams and on moist rocky ground.
The stems often form clumps and have ridges bearing glandular hairs and curved white hairs.
Sometimes short stolons extend from the base of the stem and overwinter.
Leaves are simple and opposite, long ovate, 1.5–5.5 cm long and 0.7–3 cm wide, and almost hairless.
The leaf margins have sparse, low serrations.
The petioles are very short.
Flowers are pale pink with 4 petals, and the tip of each petal is shallowly 2-lobed.
The outside of the calyx bears glandular hairs.
A slender ovary with glandular hairs lies below the flower.
The fruit is a slender club-shaped capsule 4–6 cm long with glandular hairs.
The fruit stalk is 0.8–2 cm long and sparsely covered with glandular hairs.
When ripe, the fruit splits into 4 and releases seeds with an off-white pappus.
The seeds have papillae.
