Definition of "cultivar" in English 01:15 May 11, 2011
The origin of the term “cultivar” arises from the need to distinguish between wild plants and those with characteristics that have arisen in cultivation (what we now call cultigens). This distinction dates back to the Greek philosopher Theophrastus (370–285 BCE), the "Father of Botany", who was keenly aware of this difference. (...)
The word cultivar was coined in 1923 by Liberty Hyde Bailey of the Liberty Hyde Bailey Hortorium, Cornell University, New York State, when he wrote: “ The cultigen is a species, or its equivalent, that has appeared under domestication – the plant is cultigenous. I now propose another name, cultivar, for a botanical variety, or for a race subordinate to species, that has originated under cultivation; it is not necessarily, however, referable to a recognized botanical species. It is essentially the equivalent of the botanical variety except in respect to its origin." (...)
The use of legal protection for cultivars can be controversial, particularly for food crops that are staples in developing countries, or for plants selected from the wild and propagated for sale without any additional breeding work; some people consider this practice unethical. Wikipe | 
The translation workplace 
peer agreement (net): +4