Habit: tree

Plant Height (m): 6-12 m

Elevation (m): 1750-1805 m

Distribution: China: Yunnan

Young Branch: pubescent

Terminal bud hairiness: sericeous

Leaf upper surface: glabrous

Leaf texture: leathery

Leaf lower surface: pubescent, midrib hairy

Leaf length (cm): 10-14 cm

Leaf width (cm): 4-5.5 cm

Leaf shape: oblong-elliptic, elliptic

Leaf margin: serrulate

Leaf apex: acuminate, acute

Leaf base: broadly-cuneate, cuneate

Lateral vein: pairs: 8-10

Petiole length (mm): 5 mm

Petiole: pubescent

Flower: solitary, 2-5 flowers clustered

Flower position: axillary

Flower diameter (cm): 4-5 cm

Pedicel length (cm): 0.6-0.7 cm

Pedicel hairiness: pubescent

Bractlet number: 2

Bractlet: persistent

Bractlet shape: ovate

Branchlet length (mm): 4 mm

Sepal: persistent

Sepal number: 5

Sepal shape: ovate

Sepal length (mm): 5-6 mm

Sepal hairiness: glabrous outside, sericeous inside

Petal number: 7-9

Petal shape: obovate

Petal length (mm): 20-25 mm

Petal: basally slightly connate

Stamen length (mm): 15 mm

Filaments hairiness: glabrous

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

Ovary: glabrous

Ovary locus: 5-locular

Relative length of stamens and styles: equal

Style length (mm): 15 mm

Style: 5-cleft

Fruit shape: oblate

Fruit height (cm): 2 cm

Fruit diameter (cm): 3-4 cm

Seed number per locule: 1

Seed shape: suborbicular

Seed color: brown