Cleistanthus petelotii Merr. ex Croizat

Trees 7-18 m tall, glabrous throughout. Petiole 5-8 mm, transversely striate when dry; leaf blade ovate, elliptic, or oblong, 8-19 × 3-8 cm, leathery, base obtuse or rounded, margin revolute, apex shortly acuminate; lateral veins 6 or 7 pairs, curved-ascending, anastomosing near margin, reticulate veins prominent. Flowers ca. 5 × 4.5 mm in diam., several grouped into axillary glomerules. Sepals 5, ovate-triangular, ca. 3 × 1 mm. Petals 5, obovate, ca. 0.5 mm. Stamens 5, ca. 2 mm; filaments connate below middle into a cylinder surrounding rudimentary ovary; anthers ovate-triangular, ca. 0.6 mm, connective triangular; disk scales obovate, ca. 1 mm. Rudimentary ovary with trifid apex. Female flowers: sepals and petals as in male; disk urceolate or cylindric, ca. 2 mm high, surrounding ovary, apex with minute ligules; ovary globose, smooth; styles 3. Cap sules subglobose, 11-15 × ca. 15 mm, epicarps reticulate-rugose; carpopodium 3-5 mm. Seeds ovate. Fl. Apr-Jun, fr. May-Nov.

W Guangxi [N Vietnam].

Limestone forests; 200-400 m.

Cleistanthus petelotii là một loài thực vật có hoa trong họ Diệp hạ châu. Loài này được Merr. ex Croizat mô tả khoa học đầu tiên năm 1942.

假肥牛树（学名：Cleistanthus petelotii）为大戟科闭花木属下的一个种。