Habit: shrub, tree

Plant Height (m): 1-5 m

Elevation (m): 1500-3000 m

Distribution: China: Sichuan, Yunnan

Young Branch: pubescent

Leaf upper surface: midrib hairy

Leaf texture: leathery

Leaf lower surface: midrib hairy

Leaf length (cm): 4-6.5 cm

Leaf width (cm): 2-3.5 cm

Leaf shape: oblong, elliptic-ovate, ovate, broadly ovate

Leaf margin: serrulate

Leaf apex: acuminate, acute

Leaf base: broadly-cuneate, rounded

Lateral vein: pairs: 5-7

Petiole length (mm): 2-5 mm

Petiole: pubescent

Flower: solitary

Flower position: subterminal

Flower diameter (cm): 3-5 cm

Pedicel: absent

Bractlet number: 9-11

Bractlet: persistent

Bractlet shape: ovate, suborbicular

Branchlet length (mm): 2.5-12 mm

Bractlet hairiness: glabrous outside, sericeous inside

Sepal: leathery, margin membranous, persistent

Sepal number: 9-11

Sepal shape: ovate, suborbicular

Sepal length (mm): 2.5-12 mm

Sepal hairiness: glabrous outside, sericeous inside

Petal number: 8-12

Petal color: white

Petal shape: broadly obovate

Petal apex: round

Petal length (mm): 20-40 mm

Petal width (mm): 15-30 mm

Petal: basally slightly connate

Stamen length (mm): 15-25 mm

Filaments hairiness: glabrous

Filaments: the base of outer filaments connate, not forming a tube

Ovary: glabrous

Ovary locus: 5-locular

Relative length of stamens and styles: stamens longer than styles

Style number: 5

Style length (mm): 15 mm

Style: free

Fruit shape: oblate, orbicular

Fruit diameter (cm): 4-6 cm

Seed shape: semiorbicular

Seed hairiness: glabrous, pubescent