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FOC | Family List | FOC Vol. 11 | Euphorbiaceae | Deutzianthus

1. Deutzianthus tonkinensis Gagnepain, Bull. Soc. Bot. France. 71: 139. 1924.

东京桐 dong jing tong

Trees up to 12 m tall; trunk to 30 cm d.b.h.; young branches densely stellate-hairy, glabrescent, with prominent leaf scars. Petiole 5-20 cm, glabrous, 2-glandular at apex; leaf blade elliptic-ovate to elliptic-rhomboid, 10-15 × 6-11 cm, abaxially glaucous-gray, glabrous except for tufted pubescent vein axils, adaxially glabrous, base cuneate or broadly cuneate to rounded, margin entire, apex acute to acuminate; lateral veins 5-7 pairs, arcuately ascending, anastomosing near margins. Inflorescence terminal, densely gray pubescent; male inflorescences ca. 15 × 20 cm; female inflorescences ca. 10 × 12 cm, bracts persistent and nearly filamentous. Male flowers: calyx campanulate, lobes triangular, ca. 1 mm; petals oblong, ligulate, hairy on both surfaces; disk 5-parted; stamens 7; filaments hairy; anthers exserted. Female flowers: calyx and sepals as in male, calyx 2-5 mm; disk cupular, 5-fid; ovary sericeous; styles dichotomous, diverging at apex. Fruits slightly compressed globose, ca. 4 cm in diam., gray pubescent; exocarp thickly crustaceous; endocarp woody. Seeds ellipsoid, ca. 2.5 × 1.8 cm; seed coat smooth, glossy. Fl. Apr-Jun, fr. Jul-Sep.

Densely forested slopes; below 900 m. SW Guangxi, S Yunnan [N Vietnam].


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