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

5. Bridelia affinis Craib, Bull. Misc. Inform. Kew. 1911: 456. 1911.

硬叶土蜜树 ying ye tu mi shu

Bridelia colorata Airy Shaw; B. henryana Jablonsky.

Shrubs or small trees up to 5 m tall; young branches rufous puberulent. Stipules narrowly triangular, 4-5 × ca. 1 mm; petiole 4-6 mm, puberulent; leaf blade elliptic or rarely obovate, 4-9(-15) × 2-4.5(-6) cm, papery, abaxially puberulent to pubescent, adaxially glabrous, base obtuse to acute, apex acute to obtuse; lateral veins 9-11(-15) pairs. Flowers axillary, up to 10-fascicled, (sub)sessile. Calyx conspicuously reddish; bracts small, triangular. Male flowers 4-6 mm in diam.; sepals triangular, 1.5-3 × 1-1.5 mm, pilose; petals irregularly rounded, base spatulate, apex lobulate, ca. 1 mm in diam.; staminal column ca. 1 mm; anthers ellipsoid, ca. 0.6 × 0.3 mm; rudimentary ovary cylindric; disk cup-shaped, ca. 3 mm in diam. Female flowers: sepals and petals as in male; disk urceolate, enclosing ovary for ca. 1 mm; ovary ovoid, ca. 1.3 × 1 mm, 2-celled, tapering into 2 styles. Drupes depressed globose, apically bilobed, 5-7 mm tall, 2-celled.

Montane forest and thickets; [300-]1000-1500 m. Yunnan [Thailand].

This species is sometimes misidentified in Chinese herbaria as "Bridelia yunnanensis Pax & K. Hoffmann," a name that was never validly published. W. Y. Chun and C. C. Chang (Fl. Hainanica 2: 143. 1965) recorded this species (as B. henryana) for Hainan but it has not been possible to confirm this record. Records of B. montana (Roxburgh) Willdenow in Chinese literature (e.g., Fl. Yunnan. 10: 74. 2006; Higher Pl. China 8: 22. 2001) are possibly based on material of this species.


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