Cytology of some weedy species of the family Compositae (Asteraceae) from Jos Plateau, Nigeria

Abstract
Cytological investigation of twenty‐five weedy species belonging to twenty‐three genera were investigated for the first time from Jos Plateau, Nigeria. The chromosome numbers of three taxa; Aspilia kotchyi, Coreopsis asperaia and Lactuca capensis are reported here for the first time, while chromosome numbers of five taxa; Acanthospermum australe, Ageratum conyzoides, Ethulia conyzoides, Galinsoga parviflora and Sclerocarpus africanus differ from their previous chromosome reports.