Description from Flora of China
Sloanea mollis var. chinghsiensis Chun & F. C. How.
Trees to 25 m tall, to 1 m d.b.h. Bark brown; branchlets brown-yellow tomentose. Petiole terete, 3-6 cm or longer, robust, tomentose; leaf blade ovate or narrowly elliptic, 11-15 × 6-12 cm, thinly leathery, abaxially yellow-brown tomentose, adaxially glabrous, lateral veins 8-10 per side, prominently raised abaxially, ascending and intermixed 3-4 mm from margin, conspicuous adaxially, veinlets conspicuous abaxially, base broad and rounded, or slightly cordate, margin minutely denticulate or minutely crenulate, apex acuminate, rarely acute, acumen ca. 2.5 cm. Pedicel 2-3 cm, tomentose. Sepals 4 or 5, narrowly ovate, 7-9 × 6-7 mm, both surfaces tomentose. Petals ca. as long as sepals, both surfaces puberulent, large toothed at apices. Stamens numerous; filaments ca. 4 mm, puberulent; anthers ca. 3 mm, puberulent. Ovary tomentose; style 8-10 mm, pointed at tip, pubescent in lower half. Capsule 4-valved; valve 2-2.5 cm, ca. 3 mm thick; prickles usually yellow, 1-1.5 mm; endocarp purple-red. Seeds black, shiny, 1-1.2 cm, enclosed by yellowish aril in lower 1/2. Fl. Apr-May, fr. Oct-Dec.
One of us (Chamlong Phengklai) considers Sloanea sterculiacea as possibly synonymous with this species.
Evergreen forests; 1200-1400 m. S Guangxi, SE Yunnan [N Vietnam].