The blue-grey leaves of Lobostemon glaucophyllus are alternate or spiral up the stems without stalks.

The leaf-shape is narrowly lanceolate to oblanceolate, tapering to an acutely pointed tip. The leaves are almost hairless, especially young ones or totally glabrous, growing on hairless stems. Leaves may become up to 5 cm long, and 1,5 cm wide; usually well smaller.

The margins are finely toothed or conspicuously rasped to almost entire, sometimes with hairs on the teeth. The yellowish midrib, sometimes hairy, is visible on the lower part of the blade, less conspicuous than in L. fruticosus (Vlok and Schutte-Vlok, 2010; Manning, 2007; Eliovson, 1990; iNaturalist; http://pza.sanbi.org).