Over 550 exotic plant species introduced in Portugal (Continental) are nowadays considered as casual, sub spontaneous or invasive (Marchante et al 2005, Almeida & Freitas 2006¹). Much more species were introduced but are fully controlled by Humam action, and so are not included in this number.

Portuguese legislation (Decreto Lei nº 565/99) lists about 400 exotic plant species as introduced to Portugal, and from these 30 are classified as invasive species.

Almeida in 1999² referred about 500 exotic sub-spontaneous plant species, classifying 93 as invasive species and 104 as potentially invasive species.

The team of INVADER developed a collection of leaflets about "Plantas Invasoras em Portugal - fichas para identificação e controlo" (Invasive Plant Species in Portugal - identification and control). This collection includes the 30 plant species considered invasive by Portuguese law and 3 other also invasive. The leaflets include photos, morphologic descriptions, control methodologies and some extra information about each species.

Leaflets are available online (PDF file) and in paper* format (out of print)

List of invasive plant species in Portugal (Continental)

Download of the full collection (in a single file) is possible at PLURIDOC.COM

In 2008, in the context of another Project (Raising Public Awareness about Invasive Plants in Portugal), we developed the "Guia prático para a identificação de Plantas Invasoras de Portugal Continental" (Field guide about invasive plant species in Portugal Continental) which includes 85 invasive and potentially invasive plant species.

^{1. Almeida, J.D. and Freitas, H. 2006. Exotic naturalized flora of continental Portugal – a reassessment. Botanica Complutensis 30: 117-130.}