6. Rhodoleia stenopetala H. T. Chang, Acta Sci. Nat. Univ. Sunyatseni. 1959(2): 31. 1959.
窄瓣红花荷 zhai ban hong hua he
Trees, to 20 m tall. Petiole 3–5 cm, stout, glabrous; leaf blade ovate or broadly so, 6–10 × 4–6.5 cm, drying discolorous, abaxially whitish gray, adaxially dark green, somewhat shiny, base rounded or obtuse, apex obtuse or nearly acute; 3-veined at base, lateral veins 4–6 on each side, abaxially slightly raised, obscure adaxially. Inflorescences ca. 2 cm long, ca. 2.5 cm wide in fruit; peduncle 1–1.5 cm, stellately pubescent; involucral bracts ca. 10, ovate-rounded, 5–9 mm, abaxially stellately tomentose. Petals 4, narrowly oblanceolate, 15–20 × 1.5–3 mm. Stamens 8, ca. 17 mm; filaments stout, glabrous. Ovary tomentose; styles ca. 1.5 cm. Capsules 5, ovoid-globose, ca. 1.2 cm long, styles not persistent. Seeds flattened. Fl. Mar–Jun, fr. Jul–Sep.
Evergreen forests; 600--1000 m. W Guangdong, Hainan.
This species has the narrowest petals in Rhodoleia.