An updated report on the distribution and conservation status of the endangered Cat’s Head Rockrose Helianthemum caput-felis (Magnoliopsida: Violales: Cistaceae) in Algeria

Helianthemum caput-felis is an Endangered plant species growing in the western Mediterranean basin.  Its distribution is well known to the European and Moroccan regional populations, but no data from its distribution in Algeria have been reported since the middle 20 th century.  In this study, we provide an up-to-date report on the distribution of the species in Algeria.  Fieldwork surveys in the classical locations were unsuccessful in finding the species, probably due to human habitat disturbances; however, a relict location was found in Ain-el-Kerma, near one of the historical known locations.  As there is reduced distribution we point out the main causes that threaten the habitat of H. caput-felis according to IUCN threats classification scheme and we also propose to label it in the Algerian Red List as regionally Critically Endangered (CRreg B1ab(i,ii,iii, v)+2ab(i,ii,iii,v); C2a(i,ii); D).