Plant Species, Threatened (Number)
Definition :

Plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. All current definitions of Plantae exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria). Threatened species are the number of species classified by the IUCN as endangered, vulnerable, rare, indeterminate, out of danger, or insufficiently known. There are still many species that have not yet been assessed for the IUCN Red List and therefore their status is not known (i.e., these groups have not yet been completely assessed). Therefore, the figures presented for these groups should be interpreted as the number of species known to be threatened within those species that have been assessed to date, and not as the overall total number of threatened species for each group.