Buchanania Spreng.

Buchanania (en)

Genus

Angiosperms > Sapindales > Anacardiaceae

Characteristics

Trees. Leaves spiral, simple, subcoriaceous, entire, petioled or sessile, mostly with internerval vein(s). Inflorescences axillary (also terminal?), paniculate. Flowers bisexual. Calyx 5-(rarely 4-or 6-)lobed, persistent or caducous. Petals 5 (rarely 4 or 6), imbricate, glabrous. Stamens twice the number of petals; filaments subulate, glabrous (except papillose in B. sessifolia); anthers basifixed, lanceolate or oblong, sagittate in most of the species. Disk shortly cupular, usually sulcate outside (impressions of the filaments), upper margin crenulate. Carpels 4-6, free, each 1-ovuled, usually only one fertile. Ovary ellipsoid, hairy or glabrous; style short; stigma oblique, truncate; sterile carpels smaller. Drupe 1-celled, often with an undeveloped seed; stone thick, woody or bony. Seed with testa free from the endocarp; cotyledons free, plano-convex.
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Trees. Leaves simple, alternate, entire. Inflorescences axillary. Flowers bisexual. Calyx lobes 5, rarely 4 or 6. Petals 5, rarely 4 or 6, imbricate, glabrous. Stamens twice number of petals; filaments subulate, glabrous; anthers basifixed, often sagittate. Disc cupular, crenulate, sulcate outside. Carpels 4–6, connate only at base; fertile carpel 1, with a reduced style and obsolete stigma, 1-locular; ovule 1, basally attached by an erect filiform funicle; sterile carpels with a prominent stigma and functioning as gynobasic styles. Drupe usually ±lens-shaped; exocarp and mesocarp thin; endocarp woody or bony. Seed with testa free from endocarp; cotyledons free, plano-convex.
Trees or shrubs. Leaves simple, spirally inserted; leaf blade margin entire. Inflorescence paniculate, terminal or axillary. Flowers small, bisexual, 5-merous, white, fragrant, sessile to shortly pedicellate. Calyx small, with 4-6 rounded lobes. Petals imbricate in bud. Stamens 2 × as many as petals; anthers lanceolate to oblong, often sagittate. Disk intrastaminal, cupular, sulcate to crenulate. Carpels 4-6 free, usually only 1 fertile; ovary 1-locular, 1-ovulate; style short; stigma capitate. Drupe with a thick woody endocarp. Seed testa not adnate to endocarp.
Life form perennial
Growth form tree
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Foliage retention deciduous
Sexuality hermaphrodite
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Environment

In primary forests, on dryland, temporarily inundated areas, or in peat-swamps, sometimes in secondary forest or on limestone hills; mainly in the lowland, up to c. 600 m.
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Hardiness (USDA) 9-12

Usage

Uses. The wood of some species is used for light construction, interior finishing, household implements, canoes (Papua), etc. (cf. VAN ROYEN Man. For. Trees Papua New Guinea 4 1964 9 & 13 LOMIBAO & MENIADO Forpride Digest 3 1974 69 ).
Uses wood
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Cultivation

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