Haplolobus

Haplolobus H. J. Lam

Description:
Dioecious trees; bark grayish, scaly. Leaves imparipinnate, evergreen, exstipulate; inverted vascular bundles present in pith of petioles; pulvinuli usually present at both ends of petiolules; leaflets entire, sometimes domatiiferous; epimedial tertiaries perpendicular to the midvein, long, and basiflexed, freely ending veinlets with tracheoid idioblasts. Inflorescences axillary or pseudoterminal, rarely pseudospicate, male inflorescences generally larger than female.  Flowers 3-parted; calyx cupular but 3-lobed and divided up to half its length, imbricate; petals distinct, with inflexed apiculum, valvate at apex but imbricate at middle; stamens in 2(1) series, inserted below or on base of intrastaminal annular disk, rarely on the rim; disk often persistent in fruit; pistillode reduced and parenchymatous; pistil 3-locular; style short, stigma 3-lobed or subglobose.  Fruit an indehiscent, compound drupe, ellipsoid to ovoid or subglobose; calyx persistent; exocarp dry and thin, drying rather smooth; mesocarp thin; pyrenes papery, 1(2)-seeded, the 1–2 aborted locules strongly compressed, forming an articulated, separable plate on periphery of pyrene. Seed testa thin; cotyledons plano-convex, straight.  Germination hypogeal, cryptocotylar; first eophylls opposite, simple.

About 16 spp., in lowland to montane forests, from Borneo and Celebes through Moluccas and New Guinea to W Polynesia.

Original Publication: Haplolobus H. J. Lam, Ann. Jard. Bot. Btzg. 42: 25 (1931)

Synonyms: Canarium L. (1759), pro parte.
Santiria sect. Anisandra Laut. (1920).

Bibliography: Leenhouts, Blumea 20: 283-310 (1972).

Web Links:
Tropicos – Haplolobus
The Plant List – Haplolobus

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