Scientists have discovered over 380,000 different species of plants.
There are about 391,000 species of vascular plants currently known to science, of which about 369,000 species (or 94 percent) are flowering plants, according to a report by the Royal Botanic Gardens, Kew, in the United Kingdom.
About 2,000 new plant species are discovered or described every year, many of which are already on the verge of extinction.
Based on the best available estimate, scientists say that 21 percent of all plant species – or one in every five plant species – is likely threatened with extinction.
For the first time ever, scientists have assessed the state of all vascular plants in the world — all plants (except algae, mosses, liverworts and hornworts) that have specialized tissues to transport food and water.
According to the report titled “State of the World’s Plants”, released by researchers at the Royal Botanic Gardens, Kew, in the United Kingdom, there are about 391,000 species of vascular plants currently known to science. Of these, about 369,000 species (or 94 percent) are flowering plants.
The report provides — for the first time — baseline information on all vascular plants, including new plant discoveries and threats.
“We already have a ‘State of the World’s …birds, sea-turtles, forests, cities, mothers, fathers, children even antibiotics’ but not plants,” Kathy Willis, Director of Science at the Royal Botanic Gardens, Kew, said in a statement. “I find this remarkable given the importance of plants to all of our lives– from food, medicines, clothing, building materials and biofuels, to climate regulation. This report therefore provides the first step in filling this critical knowledge gap.”
By scanning through several plant databases, including the the Plant List, the International Plant Names Index and the World Checklist of Selected Plant Families, the team found that 391,000 vascular plants are currently known to science. Moreover, about 2,000 new plant species are discovered or described every year. Many of these newly described are already on the verge of extinction.
In 2015, for example, scientists described Gilbertiodendron maximum, a critically endangered giant, heavy tree
weighing about 105 metric tons, that is found in the Cameroon-Congolian African rainforest. Researchers also described Oberholzeria etendekaensis, a succulent shrublet, which is not only a new species but a whole new genus. It is also a rare species, known only from a single locality with 30 individuals in Namibia.
According to the report, Australia, Brazil and China are the top three sources for many of the new species discovered every year. In fact, the report notes that Brazil is home to more seed plants than any other country in the world, and the knowledge of its flora is growing at a “record-breaking” pace.
We share space with nearly 400,000 plant species. But so far, only about 31,000 of these species have at least one documented use. These include uses for food, medicine, recreation, genes, poisons, animal feed, and building material.