3. Pygeum wilsonii Koehne, Bot. Jahrb. Syst. 52: 334. 1915.
西南臀果木 xi nan tun guo mu
Trees 8–24 m tall. Branchlets grayish brown, brown pubescent, glabrescent, lenticellate. Petiole 7–10 mm, densely brown pubescent; leaf blade oblong to ovate-oblong, 10–39 × 4–15 cm, papery to subleathery, abaxially persistent brown appressed pubescent and usually with 2 nectaries near base, adaxially initially brown pubescent along veins but glabrescent, base rounded to broadly cuneate, margin entire, apex acuminate; secondary veins 10–14 on either side of midvein, abaxially elevated. Racemes axillary, solitary to several in a fascicle, more than 10-flowered; rachises, pedicels, bracts, hypanthia, and sepals densely brown pubescent; bracts lanceolate to linear-lanceolate, soon caducous. Flowers 2–3 mm in diam. Pedicel 1–3 mm, 5–12 mm in fruit and sparsely brown pubescent. Hypanthium campanulate. Sepals 5, oblong, 1–2 mm. Petals 5, spatulate-oblong, slightly longer than sepals or resembling sepals. Stamens 24–30. Ovary often glabrous. Drupe black when dry, compressed globose to transversely shortly oblong, 0.9–1 × 1–1.5 cm, glabrous, apex usually slightly abruptly pointed. Fl. Aug–Sep, fr. Nov–Dec.
Foothill mixed forests, forested slopes, thickets on slopes; 900--1700 m. Sichuan, Xizang, Yunnan.