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

6. Trigonostemon bonianus Gagnepain, Bull. Soc. Bot. France. 69: 747. 1923.

勐仑三宝木 meng lun san bao mu

Trigonostemon filipes Y. T. Chang & X. L. Mo; T. kwangsiensis Handel-Mazzetti; T. kwangsiensis var. viridulus H. S. Kiu; T. lii Y. T. Chang; T. petelotii Merrill.

Shrubs or treelets, 2-4 m tall; young branches puberulent, glabrous at maturity; leaf blade narrowly elliptic to oblong- lanceolate, 10-17 × 2.5-5 cm, papery, glabrous on both surfaces, base cuneate, margin entire or sparsely serrulate, apex acuminate to caudate-acuminate, acumen obtuse; veins from base 3, lateral veins 3-5. Racemes terminal, spreading, to 15 cm, puberulent; bracts linear, 3-10 cm. Male flowers ca. 6 mm in diam.; sepals 5, lanceolate; petals yellow. Female flowers: sepals lanceolate, 5-6 mm; petals elliptic, ca. 1.2 cm, yellow; ovary glabrous; styles 3, short; stigmas capitate. Fruits not seen. Fl. May.

Open forests; 500-700 m. S Yunnan [Vietnam].


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