*3.2. Plant Materials*

Three *Ericaceae* taxa, *Erica multiflora*, *Erica scoparia*, *Calluna vulgaris*, were collected in December 2019 from three different places in Northern Morocco; Khemiss anjra (Tetouan province) with longitude −5.5125257, latitude 35.6632287; Ben karrich (Tetouan province), longitude −5.4279948, latitude 35.5068513; Souq l'qolla (Chefchouaen), longitude −5.59873, latitude 35.12112 35, respectively. The taxonomic identification was confirmed by Prof. Kadiri Mohamed, Abdelmalek Essaadi University, Tetouan, Morocco.

The plant material was collected in December according to their flourishing stage. The selected samples for the preparation of the extracts consisted of leaves and aerial parts, for both *Erica* species that bloomed in this month, while, for *C. vulgaris*, only the leaves were used because, in the same period, this species had not yet flowered.

The selected parts were dried in darkness at room temperature for 2 weeks, and then crushed in an electrical grinder to a particle size less than 4 mm; the grounded parts were stored in a refrigerator under 4 ◦C in amber glass vials to avoid oxidation effects.
