Japan Flora: Glabrous except the flowers; rhizomes tliick; stems 40-80 cm. long, branched, reddish; leaves of the main steins alternate, those of the branches opposite, oblong- ovate to oblong, 2-5 cm. long, 7-15 mm. wide, rounded to obtuse, mucronate, broadly cuneate at base and short-petiolate, callose on the margin; inflorescence a terminal panicle, the bracts thinly membranous, narrow, caducous; calyx deeply 5-parted, slightly puberulent, the lobes about 2 mm. long; corolla pale rose, 6-7.5 mm. long, papillose-puberulous on both sides, 5-lobed. July. Near seashores.

Hokkaido (sw. distr.), Honshu (Japan Sea side from Mutsu to Echigo Prov.).