1. Department of Forestry, Faculty of Agronomy and Agricultural Sciences, Laboratory of Environmental Geomatics, University of Dschang, Dschang, Cameroon
2. Department of Plant Biology, Laboratory of Systematics and Ecology Faculty of Science, University of Yaounde I, Yaounde, Cameroon
3. Plant Systematic and Ecology Laboratory, Department of Biology, Higher Teachers‘ Training College, University of Yaounde I, Yaounde, Cameroon
4. Institute of Agricultural Research for Development (IRAD), Bertoua, Cameroon
5. Department of Soil Sciences, Soil Sciences laboratory, University of Dschang, Dschang, Cameroon