Collection of information, techniques, procedures which helps to identify & classify an individual are called taxonomic aids.

Importance of herbarium

a) Collection of dried, pressed & preserved plants in sheets is called herbarium.

b) These sheets are arranged in a systemic manner according to the accepted system of classification.

c) It is used to provide information about flora.

d) It is used to study the morphology of plants.

e) Hence its comparative studies are used in identification of unknown plants.

Importance of museums

It consists of collection of preserved plants & animal used for study & references.

Many museums publish journals, research papers to make available the results of research in their collection.