The flowers of Dyschoriste rogersii grow solitary or in small cymes from leaf axils. The tubular, five-lobed calyx is narrowly cylindrical, its narrow, pointed lobes similar to each other and shorter than the tube. Some darkened, needle-like lobe tips are visible in the photo. The calyx is hairy and tends to persist. There are two short bracts below the calyx.
The corolla is blue-purple in paler or darker shades, two-lipped and finely hairy. The corolla tube is longer than its lobes. The pair of lobes forming the upper lip are roughly oblong with almost square tips; they are borne close together, even slightly overlapping. The lower lip has three lobes, the central one conspicuous from dark, long, longitudinal and short, oblique line markings. The lateral lower lobes are angled down beside the central one, in picture unmarked apart from short dark lines at the base, similar to those seen on the upper lobes. The corolla lobe margins are often wavy.
The white style protrudes from the flower centre, the stamens shorter with dull grey-brown anthers. There are four stamens in unequal pairs.
Elliptic capsules follow the flowers (Leistner, (Ed.), 2000; iSpot; www.sntc.org.sz; https://wildflowernursery.co.za; http://redlist.sanbi.org).