Falsification of flora is a disadvantageous change in the flora of an area, referred to in the technical term as its flora , through the introduction of non-indigenous plant species, or plants that are indigenous species but belong to clans of this species of non- indigenous origin .  Falsification of flora threatens biodiversity on the one hand by direct displacement of the area's own clans, on the other hand it increases the likelihood of their extinction by crossing in features of those not adapted to the particular location or the regional climateClans, such as subspecies, varieties or ecotypes, or of cultivated or horticultural clans, or of genetically modified clans or species,  with reduced natural fitness . This threat of genetic introgression is harder to detect, but it can actually be more threatening in the longer term. 
For the animal world, with the technical term fauna , there is the analogously formed expression faunal adulteration. But this is far less common.
Flora falsification can be traced back to unintentional introduction of foreign species or ecotypes. Mostly, however, it is based on their deliberate introduction and establishment, often called "application", by humans. In the past, these were sometimes plantings of attractive species in the landscape to "beautify the country",  called " anointing " by botanists . Today, much more important but are greening measures ,  , for example, to Eingrünung of buildings, the restoration of devastated areas after earthworks, construction or mining, for horticultural, agricultural or forestry use or as compensation measures of conservationin order to reduce or compensate for interventions made elsewhere. In order to counteract the falsification of the flora, the Federal Nature Conservation Act , manuals and guidelines require the use of indigenous (technical term: autochthonous ) origins.   Falsification of the flora in greenery often occurs unintentionally, because engineers and planners trust that taxa with a scientific species namerepresent uniformly reacting, evolutionary units and underestimate the differences of clans within a species. In addition, the names given by the trade are often incorrect or are used in a different sense than in the botanical specialist literature (for example in the case of types of grass used for greening  ). In particular, however, standardized processes, such as the use of standard seed mixtures or varieties that are uniformly grown across Europe in tree nurseries , often contribute to the falsification of the flora.
In German nature conservation law, Section 40 (non-native, alien and invasive species) in the Federal Nature Conservation Act is intended to counteract the falsification of flora. The release of plants of alien species in the wild is therefore subject to official approval . However, the cultivation of plants in agriculture and forestry is excluded from this. A transitional regulation applied up to and including March 1, 2020 for the application of trees and seeds outside their occurrence areas; until then this was allowed. A species within the meaning of the law is any species, subspecies or subpopulation of a species or subspecies, the term is used differently from the biological nomenclature. An alien species within the meaning of the regulation can also be a "native" species (that is, any species that is wildly distributed in Germany). It is only forbidden to spread it in the great outdoors, which is undeveloped, non- fenced areas within the meaning of the law , so house gardens, for example, are excluded.  
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- Falsification of flora in the lexicon of biology at www.spektrum.de, Spektrum Akademischer Verlag, Heidelberg 1999.
- Ministry of Spatial Planning and Environment of the State of Saxony-Anhalt (ed.): Falsification of flora in woody plantings and possible protective measures. Brochure, 20 pages. 2nd edition, Magdeburg, October 1998.
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- What is "floral adulteration"? Page 21 in Andreas Bosshard, Philipp Mayer, Anna Mosimann: Guidelines for natural greening in Switzerland. Ö + L Ecology and Landscape GmbH, May 2013.
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