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Trees or shrubs, rarely subscandent, usually secreting resin or oil but without pellucid gland-dots in the leaves; the outer bark often peeling off in flakes, scrolls, strips or sheets, usually translucent, transmitting light to the green or bluish green under-bark. Leaves spirally arranged, usually without stipules, imparipinnate, 1–3-foliolate or occasionally simple, rarely bipinnate in America. Flowers rather small, regular, bisexual or imperfectly unisexual and dioecious, in panicles, corymbs, racemes, cymes or fascicles, or solitary. Receptacle saucer-shaped or cupular; calyx, ± divided into 3–5(–6) usually valvate lobes. Petals (0–)3–5(–6), valvate or imbricate, almost always free. Stamens placed outside or on the margin of a disc, (3–5)–6, 8 or 10(–12), usually twice as many as the petals and in 2 whorls. Ovary superior, 2–5(6–8)-locular, with 2 ovules pendent from the apex of each locule. Fruit a 1–5-seeded drupe or pseudocapsule
Trees or shrubs, usually dioecious, sometimes bisexual, resiniferous. Leaves alternate, usually compound, imparipinnate, mostly crowded at end of branchlets; stipules usually present (in Australia). Inflorescence a racemose panicle, sometimes ultimately cymose, or a spike, axillary or terminal, bracteate. Flowers 3–5-merous. Sepals valvate, usually connate. Petals free. Stamens equal to or twice as many as petals, free or united, sometimes adnate to disc. Disc intrastaminal. Ovary superior; carpels usually fused, with 2 axile, pendulous ovules per carpel; style simple; stigma globular. Fruit a drupe; seeds without endosperm.
Leaves alternate, rarely opposite, bipinnate (but not in our area) or imparipinnate or 3-foliolate or 1-foliolate or very rarely simple; leaflet margins entire or variously serrate; stipules absent
Stamens twice as many as the petals or of equal number (outside our area); filaments free or slightly connate at the base; anthers 2-thecous, opening longitudinally
Stamens the same or double the number of the petals; filaments free; anthers 2-celled, opening by slits
Seeds without endosperm; cotyledons usually contorted, palmatilobed or conduplicate
Leaves alternate, rarely opposite, pinnate, rarely 1-foliolate; stipules absent
Petals 3–5, rarely absent, free or variously connate, imbricate or valvate
Petals 3–5 (rarely absent), free (or variously connate outside our area)
Fruit a drupe (the exocarp sometimes tardily splitting into 2–4-valves)
Ovary superior, 2–5-locular; ovules (1) 2 in each loculus, axile
Ovary superior, 2–8-celled; ovules 2 or 1 in each cell, axile
Disk present (or sometimes apparently absent), often lobed
Seeds without endosperm; cotyledons often contortuplicate
Trees or shrubs, usually secreting resin or oil
Flowers hermaphrodite or often unisexual, small
Calyx 3–5-lobed, lobes imbricate or valvate
Flowers unisexual or more rarely bisexual
Trees or shrubs, secreting resin or oil
Fruit a drupe or rarely a capsule
Sepals 3–5, imbricate or valvate
Disk present
