The meadows and undergrowth of mountain represent a definite Biome by WWF. It is an azonal terrestrial biome also called alpine lawns . There are fifty areas of this type throughout the world. It consists of meadows and undergrowth alive with high Altitude (Montagne, alpine stage and subalpine stage).

This biome often evolves/moves like a " small island isolé" in the tropical and subtropical areas, dissociating itself from the other uninhabited mountainous regions by a hotter climate and a less high altitude. It frequently shelters many endemic species .

The meadows and undergrowth of mountain located above the Limite of the trees are usually named alpine tundra and present in many mountainous regions of the world. Under the limit of the trees, the meadows and undergrowth are subalpine. The weak subalpine forests the such krummholz grow where the rigorous climatic conditions, a strong wind and a poor ground create dwarf and twisted forests of trees with slow growth.

In the tropical and subtropical mountains, communities of distinctive plants evolved/moved in answer to the climate cold and wet but bathed abundant light. The greatest community is the ecosystem Néotropique Paramo in the Andes cordillera. The plants characteristic of this habitat show their adaptation by their cabbage shape (rivet washer), their waxy surface and their hairy sheets. These climatic conditions are also in the mountains of central Africa and the east, with the Kinabalu Mount with Borneo, with the central higlands of New Guinea. A single characteristic of many wet and tropical areas mountainous, is the presence of giant plants in the shape of rivet washer of various families: 'Lobelia (afrotropic), Puya (Néotropique), Cyathea (New Guinea), and Argyroxiphium (Hawaii). It should be noted that it there fourteen éco-areas in continental Africa.

Where time is drier, one finds meadows and savannas of mountains as in the Ethiopian highlands and of the steppes of mountain the such Plateau Tibetan.