Near-infrared spectra of herbarium accessions of Pistacia leaves

This dataset contains 7390 near infrared spectra of 160 herbarium specimens of five species of the genus Pistacia. The herbarium specimens cover a collection period from the 18th century to the present day and come from various countries around the Mediterranean. The spectra were collected on 109 herbarium specimens and 51 new specimens over species of Pistacia. Herbarium specimens were sampled in the herbaria of the University of Montpellier and the MNHN in Paris. The 51 new specimens are herbarium samples kept at CIRAD Montpellier. The 5 species included in the study are : PIALE: Pistacia lentiscus L. PIATE: Pistacia terebinthus L. PIARA: Pistacia x saportae Burnat PIAAT: Pistacia atlantica Desf. PIAVE: Pistacia vera L. The spectral data are available in two versions: The first is the raw file with all the raw spectra (30 to 50 spectra per sample) without any treatments. The second is pre-processed spectral data, ready to use without any specific spectral knowledge. The last file contains all the data associated with the herbarium specimens. We choose to add a set of pictures to illustrate our protocol.