What is a herbarium ? How herbarium help in preserving plant specimens ?

Explanation

Herbarium is a store house of collected plant specimens that are dried, pressed, and preserved, on sheets.
(a) Herbarium sheets are arranged according to a universally accepted system of classification.
(b) These specimens along with their descriptions on herbarium sheets become a store house.
(c) The herbarium sheets also carry a label providing information about the date and place of collection, English , local, and botanical names, family and the collector's names.
(d) Herbaria serve as quick referral systems in taxonomical studies.