The pale yellow to orange or pinkish red flowers of Hermannia rudis grow solitary or in small clusters at or near branch tips, often on long enough stalks to nod. The large, coarse-surfaced sepals are pinkish red to yellow. They are about flat, rounded but with pointed tip and ridged along their midribs.
The rounded, spirally arranged petal tips flare around a narrow corolla opening, protruding only partly and variably from its calyx covering.
Flowering happens from late autumn to mid-spring (Burman and Bean, 1985; Bond and Goldblatt, 1984; iNaturalist; http://fernkloof.org.za).