Polygonum amphibium L.

Species

Family: POLYGONACEAE

Genus: Polygonum

Sinònims: Persicaria amphibia (L.) Delarbre Persicaria amphibia (L.) Gray

Catalan common name: Presseguera d’aigua.

Spanish common name: Polígono de agua, Polígono anfibio, Persicaria anfibia.

Province distribution: Barcelona. Castelló. Girona. Lleida. Tarragona. València.

General distribution (Phytogeography): Holarctic

Plants protected by law: País Valencià Catalogue.

IUCN Category: LCLeast concern

Flowering time: JanFebMarAprMayJunJulAugSepOctNovDec

Life-forms: Heliophyte.

Habitats: Non-saline wetlands (intermittent watercourses, streams, artesian wells, ditches). Mulleres de montaña, peat bog, mountainous lakes. Stagnant or slow-flowing waters.

Characteristics: Perennial herb, often aquatic and floating, with thick rhizomes. Stems up to 2 m, erect or spreading over the water, scarcely branched. Leaves with blade 15 × 4 cm, glabrous and shiny, narrower at the apex and cordate at the base. Inflorescence 2-6 cm, compact, cylindrical, on erect peduncle up to 8.5 cm. Flowers with five tepals, pale pink in color.