Abstract
The orchid flora of Greater Kabylia, in particular of the Djurdjura Biosphere Reserve and its surroundings (North-Central Algeria), is still poorly known, despite its importance as an indicator of biodiversity. For this reason, it has been studied more closely in recent years.This contribution is the result of a collaborative work started 17 years ago (2006-2022) to inventory, illustrate, map and taxonomically assess orchids in Djurdjura National Park. This area in the Greater Kabylia (K1) region, in Kabyle Tamurt Idurar, land of mountains, is home to a diverse flora whose research is still incomplete. The large number of orchids, a total of 45 species and subspecies as well as four hybrids at more than 500 localities, confirms the high biodiversity potential known for Kabylia and Numidia for this sub-region as well.This high diversity of orchids can be explained to a large extent by the different climatic conditions and the fact that in many cases the original condition has been preserved, especially at high altitudes. During mapping in the Djurdjura National Park, new orchid occurrences were discovered and historical finds were reconfirmed. Rare and endemic species and subspecies as well as four hybrids were also observed, identified and localized. Seven species, Cephalanthera rubra, Cypripedium calceolus, Dactylorhiza maculata subsp. battandieri, D. markusii, Epipactis helleborine s.l., Orchis purpurea, Platanthera bifolia subsp. kuenkelei are proposed for legal protection at the national level.