Comparison of ethnobotanical knowledge reported by the respondents in the present study and their forefathers reported by Le Floc’h [13]. (A) Venn’s diagram showing the shared ethnobotanical taxa between (a) the current community of Ouled Dabbeb and (c) their semi-nomadic ancestors reported by Le Floc’h [13]; (B) Venn’s diagram showing the shared plant taxa cited as useful by both the respondents in this study and their ancestors reported by the Floc’h [13] with d’: different method of preparation only cited by Le Floc’h [13] (d) and d: novel use only cited in this study (e); a’, b’, c’, d’, e’ and f’ represent the category and type of uses of taxa in a, a ∩ c, c, d, d ∩ e, and e respectively.