by Maureen Cofflard Agence France-Presse More than 28,000 species of plants around the world have a medical use but poor documentation means people are not making the most of the health benefits, according to a survey released on Thursday. Britain’s Royal Botanic Gardens at Kew in London recorded 28,187 species in its latest annual survey and said it was probably a “very conservative figure.” New plants discovered over the past year include nine species of […]