Habit: shrub, tree

Plant Height (m): 1.5-5 m

Elevation (m): 200-900 m

Distribution: China: Guangxi

Distribution: other countries: Vietnam

Young Branch: glabrous

Leaf upper surface: glabrous

Leaf texture: leathery

Leaf lower surface: glabrous, glandular

Leaf length (cm): 9-23 cm

Leaf width (cm): 3-7.5 cm

Leaf shape: oblong-elliptic, oblong

Leaf margin: serrulate

Leaf apex: acuminate, caudate

Leaf base: broadly-cuneate, rounded

Lateral vein: pairs: 8-10

Petiole length (mm): 10-20 mm

Petiole: glabrous

Flower: solitary, 2-5 flowers clustered

Flower position: axillary, subterminal

Flower diameter (cm): 5-6 cm

Pedicel length (cm): 1-1.5 cm

Bractlet number: 8-10

Bractlet position: spreading, arranged on the pedicel, not cover the pedicel

Bractlet shape: broadly ovate, lunate

Branchlet length (mm): 2-3 mm

Bractlet width (mm): 3-5 mm

Bractlet hairiness: glabrous on both sides, margin ciliated

Sepal: leathery

Sepal number: 5

Sepal shape: broadly ovate, ovate

Sepal length (mm): 4-8 mm

Sepal width (mm): 6-9 mm

Sepal hairiness: glabrous on both sides, margin ciliated

Petal number: 10-14

Petal color: golden-yellow

Petal shape: suborbicular, oblong-elliptic, broadly elliptic

Petal length (mm): 15-35 mm

Petal width (mm): 10-18 mm

Petal texture: more or less fleshy

Stamen length (mm): 20-25 mm

Filaments hairiness: glabrous

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

Ovary: glabrous

Ovary shape: ovate

Ovary locus: 3-locular

Relative length of stamens and styles: stamens longer than styles

Style number: 3

Style length (mm): 15-20 mm

Style hairiness: glabrous

Style: free

Fruit shape: oblate, apex retuse

Fruit height (cm): 2.5-3.5 cm

Fruit diameter (cm): 4-6 cm

Seed number per locule: 2

Seed shape: semiorbicular

Seed color: brown

Seed hairiness: pubescent