Global Plants is a database of plant type specimens, reference works, and primary sources and is an essential resource for research in botany, ecology, and conservation studies. It contains more than two million high-resolution type specimens, and this number continues to grow. Partner-contributed reference works and primary sources, such as collectors’ correspondence and diaries, paintings, drawings, and photographs, are also housed in Global Plants. Highlights include reference works and books such as The Useful Plants of West Tropical Africa and Flowering Plants of South Africa; illustrations from Curtis's Botanical Magazine; and Kew’s Directors' Correspondence comprising handwritten letters and memoranda from the senior staff of Kew from 1841 to 1928.