by Riedl, Harald and Nasir, Yasin J.Department of Botany, University of Karachi ; National Herbarium (Stewart Collection), Pakistan Agricultural research Council, 19911991
by Nasir, Yasin J.Department of Botany, University of Karachi ; National Herbarium (Stewart Collection), Pakistan Agricultural research Council, 19891989
by Nasir, E. and Nasir, Yasin. J.Department of Botany, University of Karachi ; National Herbarium (Stewart Collection), Pakistan Agricultural research Council, 19871987