One of the most important functions of botanical gardens is that:

Explanation

Ex-situ conservation means "off-site conservation." It is the process of protecting endangered species of plants and animals by removing them from an unsafe or threatened habitat and placing them or part of them under the care of humans. Botanical gardens serve as ex-situ conservation of germplasm of different plants, to maintain rare and endemic plant species, and also to provide recreation and knowledge about plants to the common man.