1. Debregeasia elliptica C. J. Chen, Acta Phytotax. Sin. 21: 477. 1983.
椭圆叶水麻 tuo yuan ye shui ma
Shrubs or small trees, 2-4 m tall; trunk to 12 cm d.b.h. Branchlets gray-green, turning brown, without leaf scars; branchlets and petioles densely, spreading hirtellous. Stipules narrowly ovate, 7-8 mm, 2-cleft to middle; petiole 4-7(-13.5) cm; leaf blade adaxially dark green, elliptic, 7-17 × 4.5-8 cm, thinly papery, 3-veined, lateral ones arcuate, reaching to distal 1/4, anastomosing with secondary veins 3 or 4 on each side distally, abaxial surface snow white tomentose, sparsely appressed strigose on veins, adaxial surface sparsely appressed strigose or subglabrous, sometimes rugose, base broadly cuneate or rounded, margin finely denticulate, apex acuminate or shortly acuminate. Female cymes borne on current and previous years’ branches, 2-4-dichotomously branched, 1.5-3 × 1.5-3.5 cm; peduncle 1-2.5 cm, spreading hirtellous; glomerules globose, 2.5-3 mm in diam.; bracts narrowly ovate to lanceolate, 0.5-0.7 mm, membranous, densely pubescent abaxially. Female flowers sessile, obovoid, ca. 0.7 mm; perianth tube membranous, 3-ribbed, 3-denticulate at apex. Achene ca. 1 mm, enclosed by membranous perianth but not adnate to it. Fl. Aug-Sep, fr. Oct-Dec.
Mixed forests in limestone mountains; 100-1900 m. SW Guangxi, SE Yunnan [N Vietnam].