Habit: shrub, tree

Plant Height (m): 1-7.6 m

Elevation (m): 1500-2250 m

Distribution: China: Yunnan

Distribution: other countries: Burma, Vietnam

Young Branch: pubescent, tenuous

Leaf upper surface: midrib hairy

Leaf texture: papery

Leaf lower surface: midrib hairy

Leaf length (cm): 5-10 cm

Leaf width (cm): 1.5-3 cm

Leaf shape: lanceolate, oblong-lanceolate, narrowly lanceolate

Leaf margin: serrulate

Leaf apex: acuminate, caudate

Leaf base: broadly-cuneate, cuneate

Lateral vein: pairs: 8-10

Petiole length (mm): 3-5 mm

Petiole: pubescent

Flower: solitary, 2-5 flowers clustered

Flower position: axillary, subterminal

Flower diameter (cm): 2.5 cm

Pedicel length (cm): 0.2-0.5 cm

Pedicel hairiness: glabrous

Bractlet number: 3-5

Bractlet: persistent

Bractlet shape: broadly ovate, semiorbicular

Branchlet length (mm): 0.5-1.5 mm

Bractlet hairiness: pubescent outside, margin ciliated

Sepal: margin membranous

Sepal number: 5

Sepal shape: broadly ovate, suborbicular, lower 1/2 part connate into cup-shaped

Sepal length (mm): 2-2.5 mm

Sepal hairiness: margin ciliated, pubescent outside, sericeous inside

Petal number: 5

Petal color: white

Petal shape: obovate, broadly obovate

Petal apex: retuse, round

Petal length (mm): 15-17 mm

Stamen length (mm): 11-14 mm

Filaments hairiness: glabrous

Filaments: lower half of outer filaments connate into a short tube

Ovary: glabrous

Ovary shape: orbicular

Ovary locus: 3-locular

Relative length of stamens and styles: equal

Style length (mm): mm

Style: 3-cleft

Fruit shape: ovate

Fruit diameter (cm): 1.5 cm

Seed number per locule: 1

Seed shape: orbicular

Seed color: castaneous