*2.1. Plant Sampling and Study Area*

*Fagonia mollis* Delile (family *Zygophyllaceae*) and *Achillea fragrantissima* (Forssk.) Sch.Bip. (family *Asteraceae*) were collected from two sites, Wadi al-Zwatin (latitude 28.539290◦ to 28.53919◦ N, longitude 33.930784◦ to 33.92044◦ E) and Wadi Selebat (latitude 28.545493 to 28.543339 N, longitude 33.933707 to 33.932984 E), Saint Katherine Protectorate, South Sinai, Egypt (Figure 1). Four individual plants from each species were collected per site. The plant samples were carefully placed in sterile polyethylene bags and brought back to the laboratory in a portable cooler maintained at 4 ◦C using ice packs. The formal identification of the plant specimens was carried out at the herbarium of Botany and Microbiology Department of Al-Azhar University, where plant herbarium specimens were also deposited.

**Figure 1.** (**A**) *Fagonia mollis* Delile. and (**B**) *Achillea fragrantissima* Forssk.
