4. Casearia tardieuae Lescot & Sleumer, Adansonia, sér. 2. 10: 293. 1970.
石生脚骨脆 shi sheng jiao gu cui
Casearia calciphila C. Y. Wu & Y. C. Huang ex S. Y. Bao.
Trees, to 12 m tall; branches with bark brown to greenish gray, young branches wrinkled, older ones flaky, branchlets glabrous. Stipules triangular, ca. 2 mm, glabrous except for ciliate margin, apex acute, early caducous; petiole 8-13 mm, robust, completely glabrous; leaf blade pale green, elliptic, ovate-oblong, or oblong, 8-13 × 3.5-6 cm, leathery to thickly leathery, both surfaces completely glabrous, midvein prominent below, lateral veins 6-8 pairs, arching upward, finely marked on both surfaces, base acutely attenuate, asymmetric, margin undulate to repand-dentate, apex shortly acute-acuminate. Flowers few in sessile axillary glomerules, small. Pedicels ca. 3 mm, glabrous; bracts ovate, ca. 0.8 mm, abaxially glabrescent, adaxially glabrous. Sepals 5, ovate, 3.5-4.5 mm, leathery, glabrous except for sparsely ciliate margin. Stamens 8; filaments sparsely pubescent, glabrescent or glabrous, ca. 2 mm; anthers oblong-ellipsoid. Disk lobes oblong, hairy at apex. Ovary conic, 2-3 mm, hairy toward apex; style very short to nearly absent, ca. 0.5 mm, glabrous; stigma capitate. Capsule ellipsoid, 2.5-3.5 mm, fleshy, verrucose. Seeds many, whitish, ovoid, completely enveloped in partly fimbriate aril. Fl. Dec-Mar of next year, fr. Mar-Nov.
Mixed forests; 1000-1600 m. Yunnan [Vietnam].
Material of Casearia tardieuae was not seen by present authors.