Deciduous trees, up to 20 meters high; The bark is thick, brown and does not crack; Branchlets are stout, pale yellow or grayish yellow, and have filamentous hairs when they are young; The terminal bud is large, narrowly ovoid, conical and hairless. The leaves are large, nearly leathery, with 7-9 leaves clustered at the branch ends, oblong and obovate, 22-45cm long and10-24cm wide, with a short or blunt apex, a wedge-shaped base, an entire microwave shape, a green hairless top, a grayish green bottom, gray fur and white powder; The petiole is stout, 2.5-4 cm long, and the stipule mark is 2/3 of the petiole.

2. Morphology of flowers

The flowers are white, with a diameter of 10- 15cm, and are fragrant; Pedicels are short and thick, villous, and there are wrapping marks under perianth segments 1cm. Tepals 9- 12 (17), thick meat, outer wheel 3 pieces light green, oblong, obovate, 8- 10cm long and 4-5cm wide. There are about 72 stamens, 2-3 cm long, anthers 1.2- 1.5 cm long, dehiscent inward, filaments 4- 12 mm long, red; The gynoecium is oval, 2.5-3 cm long.