Abstract
Seven taxa: Tridax procumbens L. Pterolobium stellatum (Forssk.) Brenan, Indigofera arrecta Hochst. ex A. Rich., I. spicata Forssk., I. trita var, maffeii (Chiov.) All, Oncobu spinosa Forssk. and Leucas martinicensis R.Br. are reported new to the flora of Saudi Arabia. Tridax, Pterolobium and Oncoba are new genera to the flora. Family Flacourtiaceae, to which Oncoba spinosa belongs, is also reported new to the flora of Saudi Arabia.