Oncosiphon glabratus Oncosiphon suffruticosum Oncosiphon intermedius Oncosiphon grandiflorus Oncosiphon africanus Oncosiphon pilulifer Oncosiphon schlechteri Oncosiphon suffruticosus Oncosiphon sabulosus Oncosiphon africanum Oncosiphon piluliferum Oncosiphon sabulosum
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024