Japan Flora: Nearly glabrous scandent herb with firm slender striate branches; leaves thick and rather firm, lanceolate to broadly so, 5-8 cm. long, 1-2 (-2.5) cm. wide, gradually acuminate, rarely acute, sometimes obtuse at base, glabrous except on midrib above, deep green and slightly lustrous above, pale green beneath, the petioles 5-12 mm. long; inflorescence much branched, as long as to slightly longer than the leaves, the pedicels 3-5 mm. long; calyx-segments ovate, slightly pilose; corolla 7-8 mm. across, purplish, the lobes ovate; corona-lobes orbicular, about half as long as the gyno- stegium; follicles narrowly lanceolate, about 9 cm. long. June-July. Warmer regions.

Shikoku, Kyushu. Ryukyus.