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

1. Epiprinus siletianus (Baillon) Croizat, J. Arnold Arbor. 23: 53. 1942.

风轮桐 feng lun tong

Symphyllia siletiana Baillon, Étude Euphorb. 474. 1858; Adenochlaena siletensis (Baillon) Bentham; Epiprinus hainanensis Croizat; S. siletiana var. trichantha Müller Argoviensis; S. silhetense Bentham.

Trees or shrubs, 3-10 m tall. Branchlets yellowish stellate tomentose. Leaves often ± clustered in whorls; stipules lanceolate, 2-4 mm, deciduous, basal glands black; petiole 3-5 mm, hairy; leaf blade panduriform-elliptic or spatulate-lanceolate, [6-]8-24 × 2-7[-9] cm, thickly papery, glabrous, base narrowly cordate or auriculate-cordate, margin entire or slightly repand, apex acuminate; lateral veins 9-15 pairs. Inflorescences 3-11 cm, tomentose; bracts lanceolate, 1-3 mm. Male flowers: calyx lobes 4, ca. 1 mm, glabrous; stamens 3-6; filaments ca. 2 mm; pistillode columnar, ca. 0.5 mm. Female flowers 1-3; epicalyx lobes small, triangular, sometimes with basal glands; sepals 5 or 6, lanceolate, 2.5-3 mm, stellate tomentulose, not accrescent; ovary tomentose; styles 3, ca. 3 mm. Fruiting pedicel ca. 4 mm, tomentose; capsule 1.2-1.8 cm in diam., lobes subglobose, tomentulose, valves thickly leathery. Seeds subglobose, ca. 7 mm in diam., marbled. Fl. Jan-Jun, fr. Jun-Oct.

Mountain slopes or riverbanks, forests; 100-1000 m. Hainan, S Yunnan [India (Assam), Laos, Myanmar, Thailand, Vietnam].


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