无腺杨桐 wu xian yang tong

Trees 12-18 m tall. Young branches grayish brown, glabrescent; current year branchlets ferruginous appressed pubescent; terminal buds conic, densely ferruginous sericeous. Petiole 0.8-1.5 cm, appressed pubescent; leaf blade elliptic-oblong, 5-11 × 2-4 cm, leathery, abaxially pale green becoming ferruginous brown when dry, grayish brown appressed pubescent or glabrescent, and not glandular punctate, adaxially dark green, shiny, and glabrous, midvein abaxially elevated and adaxially impressed, secondary veins 12-15 on each side of midvein and adaxially visible, base cuneate, margin entire, apex abruptly acute. Flowers axillary, solitary or rarely paired, ca. 1 cm in diam. Pedicel ca. 7 mm, slightly recurved, densely grayish brown pubescent; bracteoles persistent, ovate, ca. 3 × 1.7-2 mm, outside densely pubescent, apex acute. Sepals ovate, ca. 5 × 3-3.5 mm, outside densely yellowish brown appressed pubescent, apex acute. Petals white, oblong-ovate, 6-7 × 3-4 mm, outside yellowish brown sericeous along median portion, basally slightly connate, apex rounded to obtuse. Stamens ca. 25, unequal, 4-6 mm; filaments 2-4 mm, pubescent; anthers lanceolate, 1.5-2 mm, with filiform trichomes, connective exserted. Ovary conic to ovoid, densely gray sericeous, 3-loculed; style 3-4 mm, completely united, sericeous. Fruit ovoid, ca. 5 × 4 mm, 3-loculed with 7-10 seeds per locule, sericeous. Seeds brown, shiny. Fl. Nov-Dec.

● Forests on mountaintops; ca. 1300 m. Hainan (Ding’an).