Persicaria



«Polygonum» is a large genus of weed, sometimes segregated into Persicaria, Koenigia and so on The genus Persicaria used to be a part of the genus Polygonum as section Persicaria, but today it is mostly treated as an independent genus. In a narrower sense, it includes about 100 (to 150) species. Quite often the species of the genera Bistorta, Rubrivena, Aconogon and Knorringia are also placed in the genus Persicaria. The description here and the species list refer to the genus in the narrower sense.

The genus Persicaria belongs to the tribus Persicarieae in the subfamily Polygonoideae within the family Polygonaceae.

Persicaria species occur in the temperate latitudes of the northern hemisphere. Here a selection


 * Persicaria amphibia (L.) Delarbre
 * Persicaria barbata (L.) H.Hara (bas.: Polygonum barbatum L.): Asia and Newguinea.
 * Persicaria bungeana (Turcz.) Nakai (Syn.: Polygonum bungeanum Turcz.): endemic East Asia and Neophyte in North America.
 * Persicaria capitata (Buch.-Ham. ex D.Don) H.Gross, Syn.: Polygonum capitatum Buch.-Ham. ex D.Don): tropical Asia and in China sometimes Europa central.
 * Persicaria careyi (Olney) Greene (Syn.: Polygonum careyi Olney): own areal in North America
 * Persicaria chinensis (L.) H.Gross (Syn.: Polygonum chinense L.): areal in Asia.
 * Persicaria dubia (Stein) Fourr., Syn.: Polygonum mite Schrank)
 * Persicaria filiformis (Thunb.) Nakai (Syn.: Polygonum filiforme Thunb.): in Japan appears.
 * Persicaria hydropiper (L.) Delarbre)
 * Persicaria lapathifolia (L.) Delarbre)
 * (Persicaria maculosa Gray)
 * (Persicaria minor (Huds.) Opiz)
 * Persicaria nepalensis (Meisn.) H.Gross(Syn.: Polygonum nepalense Meisn.): endemic in Asia and Neophyt in Nordamerika, Europa and Africa.
 * Persicaria orientalis (L.) Spach): Asia and Australien
 * (Persicaria pensylvanica (L.) M.Gómez, Syn.: Polygonum pensylvanicum L.): North America
 * Persicaria perfoliata (L.) H.Gross (Syn.: Polygonum perfoliatum L.): Asia, Newguinea and Neophyte in Nordamerica.
 * Persicaria posumbu {(Buch.-Ham. ex D.Don) H.Gross (Syn.: Polygonum posumbu Buch.-Ham. ex D.Don): areal in Asia.
 * Persicaria salarkhanii (Hassan) (Syn.: Ampelygona salarkhanii): an Endemit Bangladesch.


 * Persicaria senegalensis (Meisn.) Soják (Syn.: Polygonum senegalensis Meisn.): in Afrika verbreitet.
 * (Persicaria tinctoria (W.T.Aiton) Spach, Syn.: Polygonum tinctorium W.T.Aiton): areal in Easteuropa and Asia.
 * Persicaria virginiana (L.) Gaertn. (Syn.: Polygonum virginianum L.): North America and Mexico.