dcsimg

Associations

provided by BioImages, the virtual fieldguide, UK
Foodplant / saprobe
stalked apothecium of Hymenoscyphus scutula is saprobic on dead, lying in water stem of Persicaria
Remarks: season: 9-11

Foodplant / open feeder
larva of Pachynematus albipennis grazes on rolled leaf (underside) of Persicaria
Other: sole host/prey

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Description

provided by Flora of Zimbabwe
Annual or perennial herbs, usually (in ours) erect. Ochreae present. Leaves large compared to Polygonum, usually more than 5 cm. Each inflorescence with usually more than 6 flowers, some or all inflorescences terminal, bracts similar to the leaves. Perianth segments mostly 5, petaloid, not enlarging in fruit. Stamens 8 (or 4-7 by reduction). Styles 2-3; nut biconvex or 3-angled.
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Persicaria Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/genus.php?genus_id=516
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Mark Hyde
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Bart Wursten
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Petra Ballings
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Flora of Zimbabwe

Persicaria

provided by wikipedia EN

Illustration from the Japanaese agricultural encyclopedia Seikei Zusetsu (1804)

Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Plants of the genus are known commonly as knotweeds[2]: 436  or smartweeds.[3] It has a cosmopolitan distribution, with species occurring nearly worldwide.[3][4] The genus was segregated from Polygonum.[5]

Description

The genus includes annual and perennial herbs with taproots or fibrous root systems, or with rhizomes or stolons. The stems are often erect but may be prostrate along the ground, and some species are prickly.[3] The stems are self-supporting or twining and climbing.[6] The leaves are alternately arranged, deciduous, and variously shaped. The brownish or reddish ochrea may be leathery to papery. The inflorescence may be a panicle or a spikelike or headlike arrangement of fascicles of flowers. The flower is white, greenish, reddish, pink or purple, with the tepals partially fused together along the bases. The fruit is an achene which can take a number of shapes, including a disc or a sphere.[3]

Taxonomy

Within the family Polygonaceae, Persicaria is placed in the subfamily Polygonoideae, where the tribe Persicarieae consists of two sister genera, Bistorta and Koenigia, together with Persicaria.[7]

Persicarieae

Persicaria

Bistorta

Koenigia

Species

As of February 2019, Plants of the World Online accepted the following 131 species:[8][Note 1]

Notes

  1. ^ As of May 2019, "Persicaria persicaria Small" was also listed, but the International Code of Nomenclature for algae, fungi, and plants does not allow tautonyms, and this name is illegitimate.[9] The correct name is Persicaria maculosa.

References

  1. ^ "Persicaria Mill". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. 2017. Retrieved 17 September 2020.
  2. ^ Stace, C. A. (2010). New Flora of the British Isles (Third ed.). Cambridge, U.K.: Cambridge University Press. p. 88. ISBN 9780521707725.
  3. ^ a b c d Persicaria. Flora of North America.
  4. ^ Persicaria. New South Wales Flora Online. National Herbarium, Royal Botanic Garden, Sydney.
  5. ^ Wilson, K. L. (1990). Some widespread species of Persicaria (Polygonaceae) and their allies. Kew Bulletin 45(4) 621-36.
  6. ^ Persicaria. FloraBase. Western Australian Herbarium.
  7. ^ Schuster et al 2015.
  8. ^ "Persicaria Mill". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2020-03-07.
  9. ^ "Plant Name Details for Persicaria persicaria Small". The International Plant Names Index. Retrieved 2019-05-05.
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Persicaria: Brief Summary

provided by wikipedia EN
Illustration from the Japanaese agricultural encyclopedia Seikei Zusetsu (1804)

Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Plants of the genus are known commonly as knotweeds: 436  or smartweeds. It has a cosmopolitan distribution, with species occurring nearly worldwide. The genus was segregated from Polygonum.

Persicaria amphibia Persicaria glabra Persicaria longiseta Persicaria minor Persicaria orientalis
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