Japan Flora: Short-pubescent; stems erect, 30-50 cm. long; leaves membra­nous, of few pairs, elliptic or narrowly so, to ovate, 6-10 cm. long, 3-6 cm. wide, short-acuminate or acute, rounded to broadly cuneate and obtuse at base, the petioles 7-)0 mm. long; inflorescence few-flowered, umbellate, sessile or very short-pedunculate; flowers small, yellowish, about 7 mm. across; corolla deeply 5-lobed, glabrous; corona-lobes nearly as long as the gynostegium, broadly deltoid; follicles obliquely spreading, lanceolate, glabrous, 4-5 cm. long, about 5 mm. wide; seeds broadly ovate, winged, about 5 mm. long. July.

Hokkaido. Sakhalin, Korea, Manchuria, and n. China.