Japan Flora: Tree, with rusty-brown, long, curled, soft hairs while young, soon glabrate, the buds ovoid, resinous; leaves 5- to 7-foliolate, the leaflets narrowly obovate-oblong, the median largest, 20-35 cm. long, about 12 cm. wide, abruptly acuminate, gradually narrowed from above the middle to the sessile base, obtusely toothed, pubescent on nerves and in axils beneath, the lateral nerves about 20 pairs; inflorescence erect, narrow, 15-25 cm. long, 6-10 cm. across, with short spreading pubescence; flowers pinkish, rather dense, on one side of the panicle branches, numerous, about 1.5 cm. across, the pedicels 3-5 mm. long; calyx-teeth 5, unequal, depressed-rounded; petals 4, recurved, on a short claw, pubescent; stamens exserted, 15-17 mm. long, arcuate; fruit obovoid-globose, about 3 cm. across, 3- valved, dehiscent; seeds chestnut-brown, lustrous, the hilum occupying about half of the surface of the seed. May-June. Mountains, especially in ravines;

Hokkaido, Honshu, Shikoku, Kyushu; common.

f. pubescens (Rehd.) Ohwi. Leaves soft-pubescent beneath.