Leaves are alternate, some whorled at the top of shoots, convolute in aestivation, lanceolate to oblong, acute or obtuse with a mucronate tip at the apex, rounded or slightly cordate at the base, entire except the slightly crenulate upper margin, often puberulous above near the base, paler and sparsely glandular-scaly beneath.

Pale yellowish green flowers open in April to May.

Capsules ripening in October, cylindric.

This shrub occurs on ridges and cliffs in cool- to warm-temperate zone.

It is planted in garden as an ornamental.

Distribution ; Honshu (Kantou to west), Shikoku, Kyushu, Yaku Island