A type specimen is a specimen selected to serve as a reference point when a plant species is first named.
Holotype and neotype are two kinds of type specimens.
Holotype is a specimen designated by the original describer of the form, to be the single physical example of a species.
Neotype is a specimen chosen when the available holotypes have been lost or destroyed
Holotype
Neotype
The specimen is designated to be the single physical example of a species, when its name and description are formally described.
These important specimens ensure that scientists have only one reference point when talking about a particular organism
New specimen chosen when all the available original specimens (holotype) are missing.
Neotypes are chosen when the original types have been lost or damaged, or where have been suppressed by the International Commission on Zoological Nomenclature (ICZN).