Alpine plants have to survive biting cold winds, low rainfall and poor soil. Generally alpines are small and low-growing. For example, the leaves of the alpine after are all close to the ground. Many alpines are ground-hugging cushion plants.
Generating warmth is important. The temperature inside a cushion plant is often much higher than the outside temperature. Some alpines, such as gentians, generate their own warmth, which allows them to
grow beneath the donor in spring.
Some alpines are covered in hair; Edelweiss is a well-known example. This is not only keeps the plant warm but also help to protect the plant from strong sunlight and to conserve water. Several alpine, such as houseleeks, store water in fleshy.
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