Description from Flora of China
Benzoin prattii (Gamble) Rehder.
Evergreen trees or small trees, up to 20 m tall. Bark gray-green. Branchlets rather stout, ca. 3 mm in diam.; old branchlets black-gray or brown, lenticellate; current year branchlets ferruginous pannose, later gradually deciduous or becoming black. Buds ovate; bud scales densely ferruginous or brown villous. Leaves alternate; petiole 1.5-3 cm, yellowish brown pannose, later glabrous or nearly glabrous; leaf blade pale greenish abaxially, green adaxially, elliptic or oblong, 10-25 × 5-12.5 cm, leathery, brown-yellow pubescent on both surfaces when young, densely brown-yellow pubescent along veins abaxially, later nearly glabrous abaxially, glabrous adaxially, base usually rounded, apex acute or shortly acuminate. Umbels several, inserted at short branch in leaf axil; peduncles ca. 2 mm or subsessile, densely brown-yellow pubescent. Pedicels ca. 1 cm, densely brown-yellow pubescent. Male flowers: tepals 6, elliptic or oblong, 4-5 × 2.5-3 mm, apex rounded, pubescent on keel of outer surface, laxly pubescent on inner surface in outer whorl, shorter in inner whorl; stamens ca. 5 mm; filament glabrous, 2-glandular below middle in 3rd whorl; glands reniform, stipitate; reduced pistil 3-3.5 mm; ovary ovate, ca. 1 mm, ovary and style laxly pubescent or glabrous; stigma capitate, equal to diam. of ovary. Female flowers: tepals narrowly ovate, ca. 2.5 × 1 mm; reduced stamens fasciated, ca. 2 mm, apex acuminate, 2-glandular near base of filament in 3rd whorl; glands elliptic, stipitate; tepals and reduced stamens laxly pubescent on outer surface, glabrous on inner surface; ovary not seen. Fruits ellipsoid, ca. 1 cm × 6 mm; stipes 2-4 mm, densely brown-yellow pubescent. Fl. Mar-Apr, fr. Aug-Sep.
● Mixed forests; below 2200 m. Guizhou, Sichuan.