1. It is a source of knowledge of flora of a region or a locality or a country.
2. It is a data store in which the information of plants is available.
3. The correct identification of plants is understood by the type specimen.
4. It provides materials for taxonomists and anatomists.
5. Pollen or microspore is preserved upto nearly 200 years without undergoing any changes in morphological features.
6. It is very useful to study cytology, structure of DNA, numerical taxonomy chemo-taxonomy etc.
7. It acts as a reservoir of gene pool studies.