Floristic regions

loosely defined region of lands around the Mediterranean Sea

thumb|240px|Macaronesia

one of the Earth's six floristic kingdoms

arid-to-semiarid plateau across northern and central Mexico

thumb|upright=1.2|Map 1: A very broad definition of Malesia includes both the World Geographical Scheme for Recording Plant Distributions's Malesia (green) and most of its Papuasia (orange). Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms. It is a phytogeographical floristic region in the Paleotropical kingdom. It was first recognized as a distinct region in 1857 by Heinrich Zollinger, a Swiss botanist and explorer. The precise boundaries used to define Malesia vary. The broadly defined area used in Flora Malesiana consis

In phytogeography, a phytochorion is a geographic area with a relatively uniform composition of plant species. Adjacent phytochoria do not usually have a sharp boundary, but rather a soft one, a transitional area in which many species from both regions overlap, called a vegetation tension zone, or ecotone.

floristic region

floristic region in North America