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Published In: Species Plantarum 1: 359. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 10/11/2011)
Acceptance : Accepted
Project data     (Last Modified On 9/6/2015)
Area distribution:

Over 20 species, many of them weeds or aquatic plants, mainly in the northern hemisphere; many cosmopolitan.


         The perennial species of this and the next genera feature frequently vegetative propagation.

    Literature: Meissner C.F., Polygonum, in DC., Prodr. 14: 83-143 (1856). Wilson K. L., Polygonum sensu lato in Australia, Telopea 3: 177-182 (1988).

  At least three additional perennial species grow on Mt. Hermon: P. cognatum Meissner (very      rare), P. cedrorum Boiss. & Kotschy, P. libani Boiss. (resembling the former), and the annual P.  polycnemoides Jaub. & Spach.



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Annual or perennial herbs, rarely shrubs. Stems erect to prostrate, sometimes climbing. Leaves alternate, simple; stipules membranous, forming clasping ochreae, often lacerate, fringed or ciliate. Inflorescences spike-like, glomerate or paniculate. Flowers usually small, hermaphrodite, either solitary or in cymose axillary clusters. Bracts partly membranous and united into a sheathing ochreole. Pedicels jointed. Perianth simple, divided into 5 (rarely more or less) subequal segments, usually enclosing fruit. Stamens 8 (rarely fewer), with 2-celled anthers. Ovary superior, 1-ovuled; style 2-3-parted, with capitate stigmas. Achene triquetrous, trigonous or lenticular. Embryo lateral.



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