Roman founders Romulus and Remus.
Unfortunately, many are at risk as habitat changes, climate change, disease, and pests all had (and continue to have) a Womens I wear Blue & Purple For Daughter Rheumatoid Arthritis V Neck T Shirt impact on plant survival around the world. According to the researchers, invasive species posed one of the largest risks, both to plants and to the world economy. The report explains that there are 4979 invasive species in the world, and that the estimated cost of their damage and removal is approximately five percent of the world economy. The good news is, scientists have calculated the number of known plant species, and there are so many out there, you could spend the rest of your life hiking through rainforests and national parks without running out of fascinating flora to identify. The bad news is, 21 percent of plant species are at risk of extinction. Increase in numbers of new vascular plant species published during the last two decades, based on data from the International Plant Name Index (IPNI 2016; www.ipni.org, accessed 6 March 2016). The actual numbers may possibly be somewhat higher as these numbers exclude hybrid taxa (which may be considered species in some cases) and taxa known at subspecific ranks that were elevated to species. On the other hand it includes species that were published but are now no longer accepted, which may even the numbers out. The years 2015 and 2016 were not yet completely indexed at this time and hence their final numbers will be higher.
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