Phytosociological research in Morocco began to get great importance in the middle of the last century. Since then, numerous studies (publications, thesis, etc.) have been carried out. Thus, during the 1950s, important works were carried out on the Atlas mountains (Quézel 1952, 1957; Nègre 1952, 1961), Western arid Morocco (Nègre 1956, 1959) and the Saharan-Moroccan confines (Lemée 1953). After a phase of “stagnation”, which was rather long, Moroccan phytosociology was going to be very dynamic, particularly between 1978 and 1996, thanks to Professor Pierre Quézel and his pupils and collaborators. All regions of the country have been explored and studied, including forests, preforests and matorrals (Quézel et al. 1981–1995; Barbéro et al. 1982; Benabid 1982), the cedar forests (Mhirit 1982, 1987), the tetraclineria (Benabid 1976; Fennane 1987), the arganeria (Peltier 1982), the lagoon and estuarine ecosystems (Bendanoun 1991), etc. More recently, the national phytosociological scheme has been enriched by the contribution of several authors on somewhat peculiar ecosystems, in particular the psammophilic groups (Gehu and Biondi 1996), the saxicoles (Deil and Galan de Mera 1996), the steppes and pre-steppes of mountains (Taleb and Fennane 2003, 2010), wetlands (Molina et al. 2009), etc. Nowadays, it could be confirmed that the major phytosociological features of the country’s main vegetation structures are known, but they still need to be refined and the gaps are unfortunately still large. This work is in this way hoping to help researchers and attract their attention to plant communities, ecosystems and regions that are little known or have not been studied so far. v