The flowering phenology of P. atrodentata in the Himalayan area was examined to determine their trends. Historic data from herbarium specimens during the last century indicate that the blooming period in P. atrodentata has advanced by 16 ± 9.02 days, compared to its typical flowering time. In the meantime, P. atrodentata has been classified as Near Threatened. Furthermore, lectotypes have been assigned to the names in accordance with the regulations outlined in the International Code of Nomenclature for algae, fungi, and plants to establish the correct application of the name.