Hoffman described this taxon as new, with a full description and type. After the Latin description he adds “- An H. auriculatum b panduratum Harv. in Harv. & Sond. Fl. Cap. III 253?”. From this it appears that the two panduratum names were, in Hoffman's mind, separate, and the citation of the author as used here seems correct.The other variety, var. transvaalense Moeser, is distinct in the ovate-rhomboid (not panduriform) leaves with a pseudopetiole to 1.5 cm long. It occurs from Zimbabwe to South Africa. Lovett & Thomas 2703! (Tanzania, Morogoro District: N Nguru, Kanga Mt, Dec. 1987) keys out here but has much denser leaves which are lanceolate (± 4 × 1 cm), glabrous above, white-pubescent beneath. I am uncertain about its status – it might be a new taxon.