Predominantly a Knersvlakte species, it occurs rather widespread from northeast of Bitterfontein to just north of Vanrhynsdorp in shale and on loamy flats covered with quartz, rarely on low quartz ridges.
On these ridges, the plants often form clusters, but as a rule they are single.
The smooth or shortly fuzzy bodies are up to 2,5 cm long and in diameter, globose, but flattened and slightly lobed on the top. They are pale green to yellowish or reddish at the end of the growing season, densely spotted with translucent dots, which usually coalesce to form an indistinct window (subfenestratum = somewhat windowed). Usually the bodies are buried up to their windows.
The slightly scented flowers are open during the day, up to 2 cm in diameter, pale to deep pink or magenta, rarely white. They appear in March-May.
