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FOC | Family List | FOC Vol. 12 | Sterculiaceae | Pterospermum

2. Pterospermum proteus Burkill, Bull. Misc. Inform. Kew. 1901: 138. 1901.

变叶翅子树 bian ye chi zi shu

Small trees or shrubs, to 6 m tall. Branchlets densely white and yellowish brown puberulent. Leaf blade variously shaped, nearly orbicular, or broadly oblong in outline, usually oblique, sometimes irregularly lobed, 5-11 × 2-5.5 cm, abaxially densely red-brown puberulent, adaxially red-brown puberulent and glabrescent, base shallowly obliquely cordate or peltate, margin entire or irregularly lobed, lobes obtuse or crenate, apex acuminate, obtuse, or truncate; juvenile leaves palmately 7-lobed, peltate. Flowers 1-4-fascicled; epicalyx lobes filiform, ca. 2 mm. Sepals linear, ca. 1.5 × 0.15 cm, abaxially densely reddish brown puberulent. Petals linear, 1-1.2 cm, veins 7 or 8. Stamens slightly shorter than petals, almost free; staminodes ca. 0.6 cm, hairy on upper part. Ovary ovoid, ca. 4 mm, densely hairy. Capsule ovoid or ovoid-cylindrical, 5-angular or slightly foveolate, 3-4 cm, densely red-brown stellate tomentose, apex with 3-5 mm beak. Seeds ca. 3 cm including wing.

● Open forests on limestone; 900-1700 m. S Yunnan.


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