3. Tetradium calcicola (Chun ex C. C. Huang) T. G. Hartley, Gard. Bull. Singapore. 34: 108. 1981.
石山吴萸 shi shan wu yu
Euodia calcicola Chun ex C. C. Huang, Acta Phytotax. Sin. 6: 120. 1957.
Shrubs or trees, to 15 m tall. Leaves 9-19 cm, 5-foliolate; leaflet blades ovate to elliptic, 5-9.5 × 2.3-4.5 cm, abaxially ± glaucous and not papillate, secondary veins 10-14 on each side of midvein, reticulate veinlets abaxially usually inconspicuous, base in lateral leaflets and in terminal leaflet obtuse to rounded, margin entire, apex acuminate. Inflorescences 5.5-13 cm. Flowers 5-merous. Sepals 0.7-1 mm. Petals purple but drying dull purplish red, 3-4 mm, outside sparsely to ± densely appressed pubescent, inside villous. Ovary sparsely to ± densely appressed pubescent; ovules 2 per carpel, superposed. Fruit (including abortive carpels, if any) 5-carpelled; follicles pyriform, ca. 5 mm, laterally densely appressed pubescent, otherwise glabrate, apex not beaked; endocarp glabrous. Seeds 2 per follicle, superposed, black, ellipsoid, shiny, attached in dehisced fruit to axile strip of pergamentaceous pericarp tissue; basal seed sterile, ca. 2 mm, containing what appears to be endosperm but no embryo; apical seed fertile, ca. 3 mm; seed coat sclerenchymatous, lacking spongy tissue, in sterile seed thin and brittle, in fertile seed thick and resistant to breakage. Fl. Jun-Sep, fr. Sep-Dec.
● Forests, thickets; 600-800 m. N and W Guangxi, S Guizhou, SE Yunnan.