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FOC | Family List | FOC Vol. 13 | Dipterocarpaceae

2. Hopea Roxburgh, Pl. Coromandel. 3: 7. 1811.

坡垒属 po lei shu

Balanocarpus Beddome; Dioticarpus Dunn; Hancea Pierre (1891), not Seman (1857), nor Hemsley (1890); Peirrea F. Heim (1891), nom. cons., not Hance (1877); Petalandra Hasskarl (1858), not F. Mueller (1856).

Trees evergreen, of main canopy or understory, white resinous. Stipules caducous, small; leaf blade thinly leathery; lateral veins pinnate; tertiary veins scalariform (in Chinese species) [or subreticulate], margin entire. Flowers sessile or shortly pedicellate, in lax panicles of unilateral racemes; bracts early caducuous, linear. Calyx segments imbricate. Exposed parts of petals usually pubescent in bud. Stamens (10-)15, slightly connate and adnate to petals; anthers ovoid, small, subequal; connectival appendages aristate or filiform. Ovary ovoid, with prominent filiform style, or hourglass-shaped, with short tapering style. Fruit ovoid or globose; pericarp usually thin, waxy; 1-seeded, closely surrounded by thickened base of calyx segments; 2 fruit sepals winglike, linear, or all orbicular or ovate, subequal.

About 100 species: Cambodia, China, S India, Indonesia, Laos, Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam; four species (one endemic) in China.

These trees are a source of a damar resin used in varnishes. The wood is finely grained, very durable, and used for making boats, bridges, and furniture.

1 Ovary globose to ovoid, style columnar; flaky barked trees: (Section, subsection Hopea)   (2)
+ Ovary hourglass-shaped; style short, tapering; smooth-barked trees: (Subsection Pierrea)   (3)
2 (1) Two fruit sepals winglike; leaf base obtuse, subequal, lateral veins 9-12 pairs.   2 H. hainanensis
+ Fruit sepals subequal, suborbicular; leaf base strongly unequal, subcordate; lateral veins 3-5 pairs.   3 H. reticulata
3 (1) Fruit sepals unequal, two winglike; leaf lateral veins 8-12 pairs.   1 H. chinensis
+ Fruit sepals unequal, suborbicular-ovate; leaf lateral veins 7-9 pairs.   4 H. shingkeng

Lower Taxa


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