Ochrosia Juss.

Yellowwood (en)

Genus

Angiosperms > Gentianales > Apocynaceae

Characteristics

Trees or shrubs with white latex. Branchlets terete, subangular or angular, glabrous, not lenticellate. Leaves in whorls of 2-4(-6), papyraceous to coriaceous when dried, glabrous. Inflorescence terminal and axillary cymes, in whorls or solitary, loose or congested, glabrous, often with bracts; peduncle sometimes winged (in Malesia occurs only in 2 species). Flowers sometimes fragrant, small, pedicellate; pedicels bracteolate. Sepals ovate, or suborbicular to orbicular, without colleters inside, connate at base. Corolla salverform, villose inside, glabrous outside; lobes elliptic, obovate, narrowly elliptic or narrowly ovate, dextrorse, glabrous. Stamens included, free from each other and gynoecium; filaments filiform, short. Gynoecium of 2 carpels (which are usually distinctly separated); disk absent or of 2 lobes, small; style filiform, split or not at base. Fruit usually apocarpous, rarely hemisyncarpous or syncarpous, drupaceous, smooth to verrucose, or with fine irregular ridges when dried, green and turning yellow, orange, red or purple when ripe; mericarps ellipsoid, obovoid, ovoid or subglobose, rarely (not in Malesian species) discoid or boat-shaped, round in transverse section or dorsiventrally compressed, sometimes with lateral and/or apical ridges, or with lateral and/or apical wing (not in Malesian species); endocarps split into diverging fibres, or consisting of thick and massive tissue, surrounding 2 lateral cavities. Seeds 1-3 on each placenta, with a wing-like structure along the margin.
More
Perennial shrubs or trees, evergreen; latex white. Stems without spines. Leaves petiolate, opposite or 3-or 4-whorled; lamina entire, chartaceous to coriaceous, glabrous; colleters absent. Inflorescences axillary, cymose, pedunculate. Flowers scented, sessile to pedicellate. Calyx without colleters. Corolla salverform; tube cylindrical, constricted at throat above stamens, glabrous, lacking scales; lobes dextrorse in bud. Corolline corona absent. Stamens included, inserted below mouth of corolla, not adherent to style-head; anthers oblong with acute tips. Disc absent. Style-head shortly cylindrical, bifid, with basal row of hairs. Fruit drupaceous, apocarpous or rarely syncarpous, cylindrical, ovoid or ellipsoidal, often angled. Seeds 2–6, compressed, elliptical or circular, narrowly winged, ecomose.
Trees with latex. Branches stout. Leaves in whorls of 3-5, rarely opposite; lateral veins numerous, subparallel, almost at a right angle to midvein. Cymes subterminal, pedunculate. Calyx deeply divided, usually without glands. Corolla salverform; tube slightly dilated above middle, to 1 cm, throat without scales; lobes overlapping to right. Stamens inserted in widening of corolla tube; anthers free from pistil head, narrowly oblong, rounded at base; disc absent. Ovaries 2, free or basally connate; ovules 2-6, biseriate on each side of a prominent placenta. Style filiform; pistil head shortly 2-cleft at apex. Drupes 1 or 2, smooth; endocarp thick, hard. Seeds 2-4 per locule, flat, not comose; endosperm none; cotyledons large, flat.
Life form perennial
Growth form tree
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Foliage retention evergreen
Sexuality hermaphrodite
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Hardiness (USDA) 8-12

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Cultivation

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