The Madrean kingdom is part of the Holarctic kingdom in floristic zoning in biogeography . Located in North America , in the southwestern part of the continent and in the Mexican Highlands . A synonym is Sonoran Paternity. There is only one area in the kingdom - Madrean. This territory coincides with tropical and subequatorial climate zones. There are many deserts, and hard-leaved shrub formations, and coniferous mountain forests.
Flora
The flora of this part of the land is so peculiar that it can be completely considered as a separate sub kingdom. The development of the flora of this area went independently of the flora of the Ancient Mediterranean sub kingdom , but in some cases their development was convergent. There are general genera of plants, for example, strawberry tree , oak , viburnum , juniper , pistachio , plane tree , etc.
There are many endemic genera, among which carnegia from the cactus family is especially noteworthy. Its individuals reach 10-12 m in height. It is more common in the Sonoran desert, which is often called cactus. Giant sequoia (mammoth tree), an evergreen growing in California, is also a famous endemic.
- Source: A.G. Voronov, N.N. Drozdov, D.A. Krivolutsky, E.G. It is chilly. Biogeography with the basics of ecology. M .: 2002.