Peucedanum isauricum (Apiaceae), a stiking new species from S Anatolia, with notes on the related P. graminifolium and P. spreitzenhoferi

Abstract

Peucedanum isauricum is described as a species new to science and illustrated. Its taxonomic position in P. sect. Palimbioidea close to P. graminifolium ofNTurkey and the more distantly related P. spreit- zenhoferi of the Levant is discussed. P. isauricum stands out in combining a junciform-polygonoid habit with heteromorphic, in their majority grass-like leaves. Light-microscopic photographs of trans- verse sections and SEM photographs of mericarps of P. isauricum and P. spreitzenhoferi are pre- sented. P. isauricum is considered a neo-endemic and only recorded from a very localised range in the western Central Taurus near Demirtaî, Antalya province, Turkey.