For example, it has been reported that there are 19 species of Tulipa in Iran and 4 of them are endemic to Iran. Thus, can we say that 15 species of Tulipa are native to Iran (Iran is the provenance of them) and 4 species are endemic to Iran (Iran is their origin)?
Provenence indicate the place from where the seed or propagation materials come from. This place can be the place where the species is native or a place where it is cultivated (and seed are obtained, many times with some kind of genetic selection).
Origin is the place where the species grows naturally, without human intervention.
Endemic refers to a species that grows only in certain area, in general small. It doesn´t grow naturally in any other place.
Native is a species that grows naturally in certain area, without human intervention. That´s why it is always necessary to put “Native from xxx (Iran, Asia, etc)” because all the species are native from somewhere.
In the sentence you asked, the 19 species are native, but 4 of them are endemic, that is, they only grow in Iran. The other 15 spp grow naturally in Iran but also in other countries.
Endemic plants can have a restricted area and some particularity of ecological factor ex. Cedus libani
but in the earth special endemic plants can have a very big area such as the Brassicaceae wich colonize in preference the north earth because they need some low temperature.
Native plants can be an endemic one but if we proof that have only a resticted area.
ex Prunus armeniaca is native from armeni and caucasian region , we know that but it is more interst that the palynology contribute this field ......
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