PJB-2010-145
THE STATUS OF ASTERACEAE IN THE ARID AND SAHARAN FLORA OF NORTH AFRICAN REGION: CASE OF TUNISIA
ZOUHEIR NOUMI*, SAAD OULED DHAOU, SALMA DERBEL AND MOHAMED CHAIEB
Abstract
In North Africa, mainly in Tunisia, the family of Asteraceae is largely represented by a number of species, since in the center and in the south of the country, the number of species is more than 172 species with 13.5% of the whole of the flora of Phanerogames in the center and the south of country. This study consists of an analysis of the botanical importance of the Asteraceae family in the southern Tunisia flora, in particular its generic composition, the biological types and the phytochoric status, which characterize this flora. The analysis shows that the Therophytes are the most abundant in Tunisia. On the other hand, the Geophytes are represented within the family of Asteraceae. The relation between Asteraceae present in Tunisia and their phytogeographical origin shows that the origin of the totality of the species is the Mediterranean circumference region. The taxons with North African origin are on the other hand slightly represented. Moreover, in spite of the abundance of the species within the family of Asteraceae
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