This key is an identification tool for weeds that are introduced in Europe as they are imported as weeds in bonsai or other potplants. As many potplants are produced in Asia and South America, many common weeds in those regions are included. The species treated in this key do not necessarily have invasive treats and some will not survive a European winter.
A total of 136 species is included. All features are illustrated with botanical drawings so that no knowledge of botanical terms is needed, basic knowledge of plant morphology, however, is helpful. Distinguishing characters have been added for certain groups of closely related species. The keys link to complete species descriptions on the Q-bank – Plants website. All species are well illustrated by photographs showing distinguishing characteristics or invaded sites. The key is regularly updated with new species and new photographs. This key is also available in French and Dutch.
Q-bank – Comprehensive databases on plant pests and diseases covers the following organism groups that contain quarantine organisms:
The databases are curated by internationally known specialists and contain specimen-based information including molecular data. The website offers the possibility to blast, in single- or multi-locus mode, sequences for identification.
Hortus Botanicus Leiden, Netherlands, Naturalis Centre for Biodiversity, Leiden & National Plant Protection Organization the Netherlands, Wageningen