Japan Flora: More or less pilose scandent annual; stems slender, branched; leaves membranous, cordate, 5-10 cm. long, 4一8 cm. wide, entire, abruptly acumi­nate, long-petiolate; peduncles 2-5 cm. long, shorter than the petioles, 1- to 3-flowered, the pedicels shorter than the calyx, the bracts linear-lanceolate; calyx-segments lanceolate, gradually narrowed to tip, green, about 2 cm. long; corolla blue-purple, 7-8 cm. long, 6-7 cm. across; ovary 3-locular and 6-ovuled; style about half as long as the corolla. June-Dec. Thickets in lowlands and hills;

Honshu (Izu Isis., Kii), Shi­koku, Kyushu. se. Asia and Australia