Hence a good herbarium forms an indispensable part of a botanical museum or institution.
The original herbarium of Linnaeus is in the possession of the Linnaean Society of London.
The herbarium at Melbourne, Australia, under Baron Muller, attained large proportions; and that of the Botanical Garden of Calcutta is noteworthy as the repository of numerous specimens described by writers on Indian botany.
The value of a herbarium is much enhanced by the possession of "types," that is, the original specimens on the study of which a species was founded.
Thus the herbarium at the British Museum, which is especially rich in the earlier collections made in the 18th and early 19th centuries, contains the types of many species founded by the earlier workers in botany.