Abstract:
This work consisted of a phytoecological study of the rupicultural and chasmophyte vegetation in the
northern Sahara of the metlili commune. We selected four stations, one at GAADA zone, one at
GEMGOUMMA and one at CHAABET SID CHIKH and one last zone GAADA ver SEBSEB
We noticed the level of station 02 and 03 the flora is very rich compared to station 01 and 04.
We have recorded 26 species spread into 16 families, the most present being Asteraceae with a rate of
23.07%.
The density is between 100 people and 1 individual throughout the four
It is noted that the species Diplotaxis harra is the most abundant in station 01, Cleome arabica is
abundant in stations 02 and 03; the species Moricandia arvensis is abundant in the station 04.
The frequency varies between 100% a 14.28 % in stations whose species Moricandia arvensis
attien maximum followed by pergularia tomentosa .
