Strombosia Blume

Genus

Angiosperms > Santalales > Olacaceae

Characteristics

Shrubs or trees; young twigs distinctly zig-zag. Leaves spiral, sometimes almost distichous, penninerved. Flowers bisexual, small, in shortly peduncled cymes or in sessile fascicles. Calyx a shallow cup, 5-lobed to various depth, showing a reddish brown prominent dot on tip of each lobe, subperigynous or perigynous, finally epigynous, accrescent, adnate to the pericarp almost to the top of the mature fruit. Petals (4-) 5, free, often reflexed at anthesis, hairy within. Stamens 5 (sometimes 4), epipetalous; filaments flat, adnate to the petals except for their uppermost part, and bearing numerous unicellular hairs; anthers didymous, dorsifixed. Disk hypogynous, prominent, (3-) 5-lobed. Ovary initially superior, finally partly inferior, i.e. partly sunken into the receptacle, almost entirely covered by the fleshy disk, 3-5 (-6)-celled below, 1-celled above; placenta free, central, from which 3-5 (-6) anatropous unitegmic ovula are pendent; style short to filiform-elongate; stigma subglobular, rather obscurely 3-5 (-6)-lobed. Drupe crowned by the persistent calyx and style base; pericarp (the outer part of which is formed by the accrescent calyx) thin-fleshy; mesocarp crustaceous or woody. Seed 1, with a small embryo in the apex of the fleshy albumen which contains oily substances and amorphous polysaccharides.
More
Trees. Leaves petiolate, alternate, entire, subcoriaceous to coriaceous, glabrous; veins very prominent beneath, ± impressed above, tertiary veins characteristically parallel to one another (as also in Strombosiopsis). Inflorescence axillary, with the flowers fasciculate on a very short lateral shoot, padlike. Flowers bisexual, pedicellate. Calyx small, tubular, 5-lobed, accrescent, adnate to the ovary. Petals 5, valvate, with a fine indumentum on the inner surface usually confined to the upper half. Stamens 5, epipetalous; filaments free for only a short distance; anthers dorsifixed. Ovary semi-inferior to inferior, 3–5-locular, borne on a disk or partially immersed in it, scarcely lobed; ovules 1 per locule, pendulous from a central placenta; style short; stigma 3–5-lobed. Fruit a drupe, bearing the remains of the calyx at the apex.
Ovary semi-inferior, 3–5-locular at the base, covered by the disk; ovules 3–5 (6), pendulous in the middle of the loculi from the top of a central placenta; style short; stigma obtuse.
Stamens 5, opposite the petals; filaments adnate to the petals; anthers dorsifixed.
Fruit drupaceous, crowned by the vestiges of the calyx-limb; endocarp crustaceous.
Seed pendulous, with a minute apical embryo, surrounded by fleshy endosperm.
Calyx-tube adnate to the ovary; limb small, with 5 broadly ovate lobes.
Flowers bisexual, fasciculate on very short lateral shoots.
Petals 5, perigynous, valvate, connivent or patent-erect.
Leaves glabrous.
Trees.
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Growth form tree
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Sexuality hermaphrodite
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Mature height (meter) 10.3 - 11.6
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Environment

Lowland forest.
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Hardiness (USDA) 8-12

Usage

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Cultivation

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