The vegetation is also extremely diverse, with one of the world's seven floral kingdoms almost exclusively endemic to the province, namely the Cape Floral Kingdom, most of which is covered by Fynbos (from the Afrikaans meaning Fine Bush (Dutch: Fijnbosch), though precisely how it came to be referred to as such, is uncertain.). These evergreen heathlands are extremely rich in species diversity, with at least as many plant species occurring on Table Mountain as in the entire United Kingdom. It is characterised by various types of shrubs, thousands of flowering plant species and some grasses. With the exception of the Silver tree, Leucadendron argenteum, which only grows on the granite and clay soils of the Cape Peninsula, open fynbos is generally treeless except in the wetter mountain ravines where patches of Afromontane forest persist.