The new subspecies Pedicularis rostratospicata subsp. marsica is here described based on morphological and molecular analyses. The new taxon is endemic to few localities of the Central Apennines within the Abruzzo, Lazio and Molise National Park (Central Italy). Pedicularis rostratospicata subsp. marsica can be distinguished from the other two currently accepted subspecies (subsp. rostratospicata and subsp. helvetica) by their taller stems, shorter petioles of basal and middle leaves, narrower blades of basal leaves, longer inflorescences with longer internodes and more flowers, and longer calyx lobes. Molecular analysis confirmed the autonomy of the new taxon. Furthermore, the conservation status assessment of the new subspecies according to IUCN categories and criteria is proposed and discussed, and an analytical key to the three subspecies of P. rostratospicata is presented.
Keywords: Abruzzo; National Park; endemism; molecular phylogeny; nomenclature; taxonomy.