This database contains specimen records from the former herbarium of the Leiden University within the botanical collection of the Naturalis Biodiversity Center (Leiden, Netherlands). The Department of Botany houses the National Herbarium of the Netherlands (NHN) which consists of herbarium collections of the universities of Leiden, Wageningen and Utrecht. In 2010 the collection of the University of Amsterdam also moved to Naturalis.The focal areas of the collection are Southeast Asia, tropical America, tropical Africa and the Netherlands. The former herbarium of the Leiden University (acronym: L) contains about 4 million specimens and has extensive collections from Southeast Asia, especially from Indonesia and New Guinea, but it also holds a large collection of palearctic plants, and is the principle herbarium for Dutch plants. As the oldest Dutch herbarium, it also contains several historic collections.