Temperate glasslands occupy the interiors of continents in temperate regions with hot summers, cold winters and low annual rainfall. Only on the shores of lakes and along the banks of rivers is there usually sufficient moisture for trees to grow. Everywhere else, the land is covered with a rolling carpet of short grass. Such conditions prevail in the steppes of Eurasia, the North American prairies, the South American pampas, the South African veld, and the Australian downlands. In this book, however, sub-tropical steppe has been treated with savannah.