Abstract: Sixty nine Boraginaceous species have been recorded in Saudi Arabia. Twenty nine of them not listed in the Flora of Saudi Arabia. These newly recorded species are mostly inhabit the mountains and the wadies as well as in the areas characterized by the great variations in temperature. The appearance of these species may be due to the rapid change in the ecological factors which leeds to the movement of the vegetation, or due to the uncomplete, previous survey of the flora. This study was pointed the need of more ecological studies to know the reasons of the change in the flora and to study how much the ecological stress may affect the speciation.