Putranjiva formosana Kaneh. & Sasaki ex Shimada

Putranjiva formosana is restricted to a series of small isolated populations and is considered to be endangered.

Small trees; branchlets sulcate or angular, glabrescent or glabrous. Petiole ca. 7 mm; leaf blade elliptic to oblong-ovate, 5-8 × 3-5 cm, thinly coriaceous, glabrous on both surfaces, base unequally obtuse, apex acuminate, margin entire to crenulate-serrulate. Racemes axillary, 6-8 mm, velutinous, with bracts. Male flowers apetalous: sepals 4-6, imbricate; stamens 2; disk and rudimentary ovary absent. Female flowers: sepals 5, narrowly elliptic; ovary ovoid, 2-celled; ovules 2 per cell. Drupes ovoid-ellipsoid, 10-13 × 7-8 mm, appressed, gray pubescent, 1-locular, 1-seeded. Fl. May-Jul, fr. Jul-Sep.

● Primary coastal forests and thickets at low altitudes. Guangdong (Zhuhai), Hong Kong, Taiwan (Taidong, Yilan).

Drypetes formosana (Kanehira & Sasaki ex Shimada) Kanehira; Liodendron formosanum (Kanehira & Sasaki ex Shimada) H. Keng.