Japan Flora: Glabrous tree with rather stout branches, the branchlets greenish; leaves usually crowded at the ends of branchlets, broadly to narrowly obovate, rhombic-obovate, 6-12 cm. long, 2-7 cm. wide, obtuse, subcuneate at base, deep green and lustrous above, slightly paler beneath; inflorescence short-pedunculate, 7-12 cm. long; flowers 10-20, 10-12 mm. across, the pedicels 2-A cm. long; anthers 1.2-1.7 mm. long; styles persistent; fruit depressed-globose, 7-10 mm. across; seeds linear, 4-6 mm. long. May-June. Mountains;

Honshu, Shikoku, Kyushu. Formosa and s. Korea.

f. longifolium (Maxim.) Ohwi. Phase with narrower, broadly oblanceolate leaves, often passing into the typical phase. Occurs with the typical phase.