Japan Flora: Much-branched deciduous shrub; leaves obovate, 2-5 cm. long, 1-2 cm. wide, subacute, acute to acuminate at base, serrulate, pilose on upper side, brown- pubescent on nerves beneath especially dense near base, the petioles 3-7 mm. long; racemes pendulous, 5- to 12-flowered, loosely brown-pubescent, the pedicels 7-15 mm. long; calyx-lobes ovate, about 2 mm. long, abruptly long-acuminate; corolla broadly campanulate, 6-8 mm. long, white, the limb 5- toothed, the teeth laciniate; styles sometimes very slightly exserted, 45-55 mm，long; capsules 5-6 mm. long. May-June. Mountains;

Honshu (w. distr.), Shikoku, Kyushu.

f. rubens (Maxim.) Ohwi. Flowers rubescent.

var. matsudae (Komatsu) Makino. Leaves broadly lanceolate to narrowly ovate, rather coarsely serrulate, slightly brown-pilose especially on midrib beneath; calyx-lobes narrowly ovate to broadly lanceolate; corolla broadly campanu- late, deep red; style slightly exserted. Apr.-May.

Honshu (from Kanto to Kinki Distr.).