Japan Flora: Deciduous tree, the branches Ienticellate, gray-brown or gray-white, young branchlets promi­nently brownish pilose; leaves broadly elliptic, obovate or ovate-elliptic, 7-17 cm. long, 4-10 cm. wide, abruptly acute, rounded to broadly cuneate or acute at base, entire, puberulent on midrib on upper side, usually brownish pilose beneath, the petioles 1-1.5 cm. long; flowers pale yellow; corolla campanulate, pubescent especially on the outside of lobes; fruit globose, ovoid, 4-8 cm. in diameter. June. Widely cultivated in Honshu, Shikoku, Kyushu.

var. sylvestris Makino. Wild phase, more densely pubescent; leaves rather small and narrower; ovary pilose. 

Honshu ('v, distr.), Shikoku, Kyushu. s. Korea and China.