The sessile (stalkless) leaves of Mesembryanthemum oculatum grow in opposite pairs in the lower stem parts, subopposite nearer the flowers. Leaf-shape is nearly cylindrical but for the concave upper surface that can sometimes be distinguished. The leaves are erect, the tips rounded. Leaves become up to 2 cm long.
Large water cells are present on the leaf surfaces, sometimes also hairs near the leaf bases. Old, withered leaves tend to remain on the stems, a phenomenon referred to as marcescence.
The reddish or yellowish, hairy internodes that space the leaves vary in length (Le Roux, et al, 2005; Smith, et al, 1998; Herre, 1971; iNaturalist).