Heracleum mantegazzianum Somm. & Lev.

Giant hogweed
Heracleum_mantegazzianum_01 Heracleum_mantegazzianum_02

Description 1

Perennial herbaceous plant from 2-6 m high. Thick, yellow main root. Alternate leaves that are deeply divided and irregularly toothed. Before flowering they have a rosette of alternate leaves of up to 3 m long and 1.7 m wide. Glabrous top, with a leave stalk and pubescent underneath. Floral stem of up to 5 m high with a diameter of 10 cm. Inflorescence in the umbels of up to 80 cm in diameter with white or pink flowers.

Biology 1

Flowers between June-August. It takes 2 to 5 years to flower. Once the plant is established, it disperses short distances due to the birds that eat its fruit. Its dormant seeds survive in the ground for up to 7 years.

Habitat 1

It inhabits basins, on the sides of roads, rivers and streams, meadows, forest clearings, etc. It requires humid soil and sunny environments. It lives in areas with an average rainfall of 1000 to 2000 mm.

Sources 1

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

Spanish Catalogue of Exotic Invasive Species - Flora 1


Fuentes y Créditos

  1. Adaptado por INVASORES - administrador de un trabajo de (c) cartotragsatec, algunos derechos reservados (CC BY), http://natusfera.gbif.es/guide_taxa/1815

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