Cornaceae

  • K. Kubitzki
Chapter
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 6)

Abstract

Trees or shrubs (rhizomatous halfshrubs). Hairs simple, unicellular. Leaves alternate or opposite, simple, entire (dentate), exstipulate. Inflorescences many-flowered thyrso-panicles, heads, or few-flowered cymes; flowers hermaphrodite to unisexual, actinomorphic, epigynous, mostly 4- or 5-merous; calyx adnate to ovary with 4–5(–10) lobes or teeth or obsolete; petals free (basally connate), imbricate or valvate, reduced or lacking in pistillate flowers; stamens as many as and alternating with petals, or in 2 isomerous whorls (in 1 whorl of up to 40 stamens), mostly attached to or around the edge of an epigynous nectary disk (lacking in Davidia); filaments free; anthers bithecate, dehiscing longitudinally; pistil 1–2(–9)locular; style with lobed or capitate stigma, or with 2–3 style branches; ovary inferior, with 1 pendulous ovule per locule; ovules anatropous (hemitropous), unitegmic and crassinucellate (Nyssa and red-fruited Cornus tenuinucellate). Fruits drupes, often with a germination valve, 1(2–6)-seeded (syncarps); seeds small to medium-sized, exotestal, with straight embryo and copious endosperm.

Keywords

Corn Cretaceous Oxalate Alkaloid Miocene 

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© Springer-Verlag Berlin Heidelberg 2004

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  • K. Kubitzki

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