Crassula helmsii (Kirk) Cockayne

Swamp stonecrop, New Zealand pigmyweed
Crassula_helmsii_01 Crassula_helmsii_02

Description 1

A 10-130 cm long aquatic or semi-terrestrial succulent plant with floating or crawling stalks with roots in the nodes. Opposing, sessile and succulent linear-spear shaped to ovate-spear shaped and sharp leaves that are 4-20 mm long and 0.7-1.6 mm wide. White or pink solitary flowers in the axils of the leaves. It can grow in an emergent, submerged or terrestrial way.

Biology 1

It prolifically reproduces in a vegetative way through fragments, but also via seeds, although in Europe this does not seem to be viable. They are able to survive prolonged periods of drought and a certain degree of salinity, as well as minus temperatures.

Habitat 1

Reservoirs, lakes, water courses and wetlands. Still water bodies from natural lagoons or meanders without vascular vegetation. Coastal stretches of in-land water masses.

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

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/1939

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