The sessile (stalkless) Oedera squarrosa leaves are densely clustered near the stem-tips. Lower stems become nude, marked with leaf scars. The leaves on young stems are often neatly four-ranked, on other plants (as in picture) less so, more imbricate and less decussate. Non-flowering stems end in compact rosettes of acutely pointed and attenuated leaf-tips that curl down but not excessively so.
The broad, ovate blades taper to tips that attenuate into mucros. The leaf margins are entire and thickened. The blades (and stems) are faintly gland-dotted, which causes them to be gummy. The mostly hairless leaves may sometimes be sparsely haired on their margins.
Leaf dimensions are from 2 mm to 15 mm long and from 1,5 mm to 7 mm wide. Most leaves tend towards the middle and lower end of these size ranges (Vlok and Schutte-Vlok, 2015; Manning, 2007; Bond and Goldblatt, 1984; iNaturalist; Wikipedia; https://keyserver.lucidcentral.org).