Alternanthera philoxeroides (Mart.) Griseb.

Alligator Weed
Alternanthera_philoxeroides_01 Alternanthera_philoxeroides_02 Alternanthera_philoxeroides_03

Description 1

Rising, floating, fleshy, perennial plant, that can grow up to 1 m, sometimes with fibrous roots in the nodes. It presents great inter-nodal gaps. Long, branched stalks with shiny, dark green leaves that are simple, spear-shaped with smooth edges and a distinctive central nerve (2-7 cm long and 1-2 cm wide). White inflorescence in a 8-10 mm wide ball shape which is similar to paper.

Biology 1

Asexual reproduction in the areas where it acts as an invader, through the axillary buds in each node. Quick growth in the warm months, generally taking root in a solid substrate and growing in a tangled, mat-like formation on the surface of the water.

Habitat 1

It can grown in a large variety of environments, including dry earth, but it normally appears on lakes, riverbanks, waterways, wetlands, estuaries, canals, etc.

Sources 1

Spanish Catalogue of Exotic Invasive Species and Document sheets of the Exotic Invasive Species Act 630/2013. (GEIB), CABI

Spanish Catalogue of Exotic Invasive Species - Flora 1

http://www.mapama.gob.es/es/biodiversidad/temas/conservacion-de-especies/especies-exoticas-invasoras/ce_eei_flora.aspx

Fuentes y Créditos

  1. Adaptado por INVASORES - administrador de un trabajo de (c) cartotragsatec, algunos derechos reservados (CC BY-SA), http://natusfera.gbif.es/guide_taxa/1929

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