Estrela Figueiredo was a tenured scientist at the Instituto de Investigação Científica Tropical, Lisboa, Portugal, until 2007, after which she assumed associate positions at the South African National Biodiversity Institute and the University of Pretoria. She is currently attached to the Nelson Mandela University in Gqeberha, South Africa. As a plant systematist, she has focused virtually her entire career on the flora of Africa, including that of Angola. Gideon F. Smith has held several senior management positions at the South African National Biodiversity Institute, as well as the John Acocks Chair in Botany at the University of Pretoria. He is at present attached to the Nelson Mandela University in Gqeberha and is South Africa’s most prolific author on Old and New World succulents. Among their many books, Figueiredo and Smith are coauthors of Plants of Angola / Plantas de Angola and Common Names of Angolan Plants.