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Resume Cette etude est une premiere exploration regionale visant la recherche des plantes endemiques de la region d›Oran en vue d›une eventuelle evaluation de leur etat de conservation. Les recherches se sont basees essentiellement sur les 124 releves phytoecologiques realises a travers les secteurs O1 et O2 ainsi que certains sorties ciblant les stations de presence des especes endemiques signalees pour la region d›Oran dans la litterature. Ces recherches de terrain ont conduit a l›identification de 17 taxons endemiques dont certains sont tres rares comme Brassic aspinescens et Helianthemum maritimum. D’autres especes ayant ete ciblees par les recherches n’ont pas ete retrouvees ce qui renforce l’hypothese de disparition de certaines d’entre elles. En plus de cette premiere liste des endemiques reellement observes dans la region depuis l’independance du pays, les donnees sur leurs aspects chorologiques, ecologiques et biogeographiques sont exposees et discutes. Mots cles: Endemique, flore, chorologie, conservation, inventaire, Oran, rare. Abstract This study is a first regional exploration for plants research of the Oran region for a possible evaluation for their conditions of conservation. The research were basically based on 124 phytoecological records carried out across the sectors O1 and O2 as well as some data targeting endemic species presence stations reported for the region of Oran in the literature. This field searches led to the identification of 17 endemic taxa some of which are very rare like Brassica spinescens and Helianthemum maritimum. Other targeted species were not found, which reinforces the hypothesis of the disappearance of some of them. In addition to this first list of endemics actually observed in the region since the independence of the country, the data on their chorological, ecological and phytobiogeographical aspects are exposed and discussed. Key words: Endemics, flora, chorology, conservation, inventory, Oran, rare.

Etat des connaissances et conservation de flore endemique dans la region d’Oran (Algerie occidentale)