Abstract
Dioecious tall soft-wooded, buttressed trees or (andro)dioecious robust perennial actinorhizal herbs; cork cambium initially superficial. Leaves spiral, petiolate, simple and heart-shaped or imparipinnate to pinnatifid, entire or dentate, estipulate. Inflorescences thyrsoid, long, pendant, terminal or terminal and axillary spikes or (males only) thyrses, or compound, contracted thyrses. Flowers subsessile or shortly petiolate; male ones: calyx tube very short or 0, with 3–10 lobes; petals 0 or (Octomeles) small and greenish; stamens 4–15(25); filaments very short or elongate; anthers basifixed, bilocular, dehiscing longitudinally; vestigial gynoecium sometimes present; female and bisexual flowers: ovary inferior, unilocular with 3–8 longitudinal parietal or protruding-diffuse placentae; carpels forming a roof over the ovary on the rim of which the calyx tube with the widely separated stylodia is inserted; calyx lobes 3–8, short; petals 0; stamens, if present, few; stylodia short and broad with a distinct stigma or elongate and bifid and stigmatic throughout; ovules in the single cavity 20–100, pendulous to horizontal, anatropous, bitegmic, crassinucellate. Fruit capsular, dehiscing either apically or laterally. Seeds very numerous, minute; endosperm scant or 0; embryo straight. x=11, 23.
Datiscaceae Bercht. & J.Presl (1820), nom. cons. Tetramelaceae Airy Shaw (1965).
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Swensen, S., Kubitzki, K. (2010). Datiscaceae. In: Kubitzki, K. (eds) Flowering Plants. Eudicots. The Families and Genera of Vascular Plants, vol 10. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14397-7_11
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