Sinowilsonia henryi Hemsl.

Shrubs or small trees to 8 m tall. Stipules ca. 8 mm; petiole 0.8–1.5 cm; leaf blade 10–18 × 6–10.5 cm, base rounded to shallowly cordate, asymmetrical, margin entire or dentate, apex acute to shortly acuminate, lateral veins 7–9 on each side, abaxially prominent. Male inflorescences 6–8 cm, lacking basal leaves. Female inflorescences 6–8 cm, with 1 or 2 basal leaves; peduncle ca. 3 cm, pendent, 10–20 cm in fruit. Bracts lanceolate, ca. 2 mm; bracteoles linear-lanceolate, ca. 1.5 mm, stellately tomentose. Male flowers: anthers ca. 1 mm. Female flowers: sepals ca. 1.5 mm, stellately tomentose. Ovary stellately tomentose; styles 3–5 mm. Capsules sessile, ca. 10 mm, villous with gray-yellow hairs, apex acute; persistent floral cup 4–5 mm, stellately tomentose with yellow hairs, loose from capsules. Seeds ca. 8 mm. Fl. Mar–May, fr. Jun–Aug.

Gansu, Henan, Hubei, Shaanxi, Shanxi, Sichuan.

Forests; 800--1500 m.

Sinowilsonia is a monotypic genus of plant containing the single species Sinowilsonia henryi. It is endemic to China. It is threatened by habitat loss. It is available from specialized commercial nurseries.