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Deciduous shrubs or small trees. Shoots terete. Terminal bud present or 0. Lvs opposite, usually simple, rarely pinnate or lobed, generally entire. Infl. of many small, often fragrant, ☿ fls in lateral or terminal panicles. Calyx 4-lobed, small, persistent, campanulate. Corolla salverform; tube cylindric; lobes 4, valvate, spreading. Stamens 2, included or exserted, epipetalous. Stigma 2-lobed, not exceeding stamens. Fr. a leathery capsule, loculicidal, coriaceous; seeds 2 per cell, winged.
Fls perfect; cal small, campanulate, truncate or 4-toothed; cor salverform, 4-lobed; stamens 2, included in our spp.; fr a 2-locular capsule with 2 seeds per locule; much branched deciduous shrubs with simple, entire lvs and fragrant fls in dense mixed panicles. 30, Eurasia.
