Habit: tree

Plant Height (m): 5-15 m

Elevation (m): 1900-2210 m

Distribution: China: Guizhou, Yunnan

Young Branch: glabrous

Terminal bud hairiness: puberulous

Leaf upper surface: glabrous

Leaf lower surface: glabrous, midrib hairy

Leaf length (cm): 10-13 cm

Leaf width (cm): 4-6 cm

Leaf shape: oblong-elliptic, oblong, elliptic

Leaf margin: serrulate

Leaf apex: acute

Leaf base: broadly-cuneate, cuneate, rounded

Lateral vein: pairs: 8-10

Petiole length (mm): 5-10 mm

Petiole: glabrous, pubescent

Flower: solitary, 2-5 flowers clustered

Flower position: axillary

Flower diameter (cm): 4-4.5 cm

Pedicel length (cm): 0.5-1 cm

Pedicel hairiness: glabrous

Bractlet number: 2

Bractlet: early deciduous

Sepal: persistent

Sepal number: 5

Sepal shape: ovate

Sepal length (mm): 5-8 mm

Sepal hairiness: glabrous outside, pubescent on both sides

Petal number: 9-12

Petal color: white

Petal shape: broadly ovate, obovate, sepal-shaped

Petal length (mm): 15-25 mm

Petal hairiness: pubescent on both sides

Stamen length (mm): 15 mm

Filaments hairiness: glabrous

Filaments: lower half of outer filaments connate, not forming a tube

Ovary: pubescent

Ovary shape: orbicular

Ovary locus: 3-locular, 5-locular

Relative length of stamens and styles: stamens shorter than styles

Style hairiness: glabrous

Style: 3-parted, but not to the base, 5-parted to the middle

Fruit shape: orbicular

Fruit diameter (cm): 5-6 cm

Seed number per locule: 1, 2

Seed shape: semiorbicular, suborbicular

Seed color: brown