This assessment includes 400 vascular plants from ninety families, including large trees, aquatic plants and epiphytes, and occupying a wide range of habitats. The assessment found that 2.4% (nine plants) of extant medicinal plants included in the assessment for which sufficient data are available are threatened. Twenty five species were considered Data Deficient (i.e., for which there was insufficient information available to assess against the Red List criteria) and as a result the precise proportion of threatened species is uncertain and could lie between 2.3% (if all Data Deficient species are not threatened) and 8.5% (if all Data Deficient species are threatened).
The main current threats emerging from the analysis include, in descending order of importance: wild plant collection, livestock farming, general ecosystem modifications, agriculture (other than livestock), silviculture, invasive alien species, transport infrastructure, and energy production and mining. For the selected medicinal plants, 164 (41%) were assessed as having a stable population trend, whilst 125 (31%) were considered to be declining in population size in Europe. More than one quarter (101, 25%) have an unknown population trend and a small part of the group (2.5%) have increasing populations.