Kalanchoe welwitschii var. gracilituba Welw. ex Britten, 1871
Figueiredo & Smith, Friedrich Welwitsch and his overlooked contributions to the Flora of Tropical Africa, Phytotaxa 458(1): 83-100, 2020, publish a lectotype of K. welwitschii var. gracilituba at LISU. However they err. According to Murray, 1904, the types of all species collected by Welwitsch, listed in Hiern's Catalogue of 1896, are at BM. The holotype is BM649719, so there is no need to designate a lectotype at LISU.