NAHED M. WALY and SABAH H. EL GAYED 2012. BOTANICAL AND BIOLOGICAL STUDIES OF PLECTRANTHUS TENUIFLORUS (VATKE) AGNEW. (LAMIACEAE) GROWING IN SAUDI ARABIA: Life Science-Botany. International Journal of Life Science and Pharma Research. 2, 2 (Jun. 2012), L52-L64.