The simple, mostly alternate leaves of Colpias mollis are heart-shaped to somewhat roundly triangular. The margins are toothed to incised. The infolding, soft blades are covered in soft hairs on both surfaces. Leaf diameter is about 2,5 cm (Williamson, 2010; Le Roux, et al, 2005; iNaturalist; https://pza.sanbi.org).