Very rare. (Species that have been introduced into Gibraltar. (Unknown).; Gibraltar flora database (Unknown));
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Invasive (European Commission (2005) Especies vegetales invasoras en Andulasia. La Consejería de Medio Ambiente, Junta de Andalucía);
Not a problem. (Species that have been introduced into Gibraltar. (Unknown).);
Introduced from North America. Very rare. (Species that have been introduced into Gibraltar. (Unknown).); Very Rare. (Gibraltar flora database (Unknown));
Species that have been introduced into Gibraltar. (Unknown).; Gibraltar flora database (Unknown); European Commission (2005) Especies vegetales invasoras en Andulasia. La Consejería de Medio Ambiente, Junta de Andalucía;