翅柄紫茎 chi bing zi jing

Hartia sinensis Dunn, Hooker’s Icon. Pl. 28: t. 2727. 1902, not Stewartia sinensis Rehder & E. H. Wilson (1915); Hartia serratisepala Hu.

Trees 6-15 m tall, evergreen. Year-old branchlets purple, glabrous; current year branchlets grayish yellow pubescent. Petiole 1-1.5 cm, gray pubescent, wings ca. 3 mm wide; leaf blade elliptic to oblong, 6-10(-13) × 2.5-4.5(-5) cm, leathery, abaxially yellowish green, sparsely pubescent or glabrescent, and trichomes evident along midvein, adaxially green, shiny, and glabrous, midvein red, secondary veins 10-12 on each side of midvein, secondary and reticulate veins abaxially raised and adaxially impressed, base rounded, margin serrate, apex abruptly acute to shortly acuminate. Flowers solitary, ca. 3 cm in diam. Pedicel 8-10 mm, appressed pubescent; bracteoles persistent, elliptic, 5-7.5 × 3-3.5 mm, appressed pubescent. Sepals purplish red, long ovate, 1-1.5 × 0.7-1 cm, leaflike, both surfaces white sericeous, veins pinnate, margin serrulate, apex acute. Petals white, broadly obovate to suborbicular, 1.5-1.8 × 1-1.3 cm, outside basally white sericeous, apex rounded. Stamens 7-9 mm; filaments basally connate. Ovary ovoid, 3-4 mm, glabrous; style ca. 5 mm. Capsule long ovoid, 1.5-2 × 1-1.5 cm, 5-loculed with 4 seeds per locule; columella ca. 5 mm, apically abortive. Seeds obovate, ± compressed, ca. 5 × 3.5 mm, narrowly winged. Fl. Apr-May, fr. Sep-Nov. 2n = 36*.

● Forests; 1200-2600 m. S and W Yunnan.