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[This article belongs to Volume - 56, Issue - 02]

Abstract : The plant kingdom is a polyphyletic assembly of photosynthetic organisms. This group is formed by two lineages, one of the algae and the second of land plants, which include bryophytes or Bryophytes, ferns, gymnosperms and angiosperms. Bryophytes are small terrestrial plants seeking humid sites, especially in boreal and alpine zones. They thus occupy a large part of the rocks and tree trunks. The order Bryophyta includes liverworts, hornworts, and mosses. The North-East of Algeria is known for its humid and sub-humid bioclimatic stages, sheltering dense and diversified vegetation where mosses occupy a prominent place but which remain little known. As part of the inventory of mosses, two stations (Oued El Hout and Roum Essouk), belonging to different forest formations, were the subject of our study. The floristic inventory revealed the existence of saven species of mosses. However, this study still needs to be completed, and much remains to be done to lead to a good knowledge of the muscinale flora of the national park of El-Kala.