Ehretia asperula Zollinger & Moritzi

Shrubs climbing, 3-5 m tall; branches gray-brown, stout, glabrous; branchlets brown or light brown, pubescent when young. Petiole 0.6-1.5 cm, tuberculate; leaf blade broadly elliptic to oblong-elliptic, 3-12 × 2-6 cm, leathery, glabrous or abaxially pubescent in vein axils, base rounded, margin usually entire, apex obtuse or mucronate. Cymes light brown, terminating branchlets, flat topped, 4-6 cm wide, pubescent; bracts linear to linear-oblanceolate, 3-10 mm, sometimes curved, persistent. Pedicel 1.5-3 mm. Calyx brown, 1.5-2.5 mm, pubescent. Corolla white, funnelform, 3.5-4 mm, base ca. 1.5 mm wide; throat ca. 5 mm wide; lobes triangular-ovate, 2-2.5 mm, slightly longer than tube. Filaments 3.5-4 mm, inserted at upper part of base, ca. 1 mm; anthers ca. 1 mm. Style 3-4 mm, branches ca. 1 mm. Drupes red or orange, 3-4 mm in diam.; endocarp divided at maturity into 4 1-seeded pyrenes.

Arid slopes, open forests. Hainan [Indonesia, Vietnam].

Dót (danh pháp hai phần: Ehretia asperula) là loài thực vật có hoa trong họ Ehretiaceae. Loài này được Zoll. & Moritzi mô tả khoa học đầu tiên năm 1846.

宿苞厚壳树（学名：Ehretia asperula）为紫草科厚壳树属下的一个种。