Sebaea aurea grows flat-topped clusters of flowers at stem tips. The yellow (or sometimes white) flowers are four-petalled. The four pointed green sepals are keeled, the corolla tube up to 6 mm long, but shorter than the petal lobes. The broadly elliptic spreading petals have rounded or pointed tips. Thin yellow anthers are visible above the flower centre.
S. aurea is a diplostigmatic species, which means there are two stigmas upon the style. This is a curious feature, as apart from the usual stigma at the top, a second one is positioned at the base of the style. The lower one might be opportune for pollen grains dropping from dining pollinators, but there might also be anticipation of the visitor that digs in more intimately.
The corolla diameter is about 1 cm. Flowering happens from midspring to early summer (Privett and Lutzeyer, 2010; Manning, 2007; iNaturalist; iSpot; Wikipedia).