The flower tube of Peliostomum leucorrhizum in picture is angularly ridged in its broader, upper part with faint shine that is absent from the glabrous, blue corolla lobes that spread around the mouth. The tube is here white inside, sometimes striped down the inside with darker blue or purple patches at the lobe bases.
The corolla tends to be slightly two-lipped, the upper lobe pair sometimes marked darker or more widely marked where they flex outwards.
Flowering happens from before midspring to early autumn, if the rain is sufficient (Van Rooyen and Van Rooyen, 2019; Vlok and Schutte-Vlok, 2015; Shearing and Van Heerden, 2008; Leistner, (Ed.), 2000; iNaturalist).