Explanation:

The largest herbarium in India is INDIAN BOTANICAL GARDEN, Kolkata. It consists of 1000000 number of specimens.The gardens were founded in 1786 by Colonel Robert Kyd, an army officer of the British East India Company, primarily for the purpose of identifying new plants of commercial value, such as teak, and growing spices for trade. Joseph Dalton Hooker says of this Botanical Garden that "Amongst its greatest triumphs may be considered the introduction of the tea-plant from China ... the establishment of the tea-trade in the Himalaya and Assam is almost entirely the work of the superintendents of the gardens of Calcutta and Seharunpore