About Arctopus echinatus L.
Note: In 1991, Burtt (in Edinburgh J. Bot. 48: 184) pointed out that material in the Clifford herbarium was a likely type, but there is no relevant specimen there. The same author later designated a Burman copperplate (Rar. Afr. Pl. 1: t. 1, 1738, reproduced by Jarvis in Symb. Bot. Upsal. 33 (3): 30, f. 5, 2005) as the lectotype. However, this plate is identifiable as A. monacanthus Sonder, not A. echinatus. As a result, in 2006, Van Wyk and others (in Taxon 55: 541) proposed the conservation of A. echinatus with a conserved type.