Traditionally it marks the border of the tribes of the confederation of Jlass in the region of Kairouan. Botanisches Zentralblatt: referierendes Organ...

the people who actually occupied the land, members of the Souassi and fr:Jlass tribes, refused to pay him any rent, arguing that they had always been there...

government expeditions to Central Tunisia; the Ouerghamma, the Neffat and the Jlass. The French invasion upset the relationships between the makhzen tribes...

every region of group was represented however; the Fraichiche, Majeur, Jlass, Ouled Ayar, and Ouled Aoun tribes were unrepresented, as were Téboursouk...