rochensis Geissorhiza radians or winecup flower is a highly threatened species from the Iris family with fewer than 10 remaining sub-populations growing in south-western Cape Town, South Africa.

[1] The deep purple flowers with large, red centres grow is dense colonies which makes for a spectacular flower displays from mid-September, particularly around the town of Darling.

Its seasonally wet lowlands habitat is however becoming increasingly threatened with more than 80% of its original habitat now permanently transformed into agriculture or urban sprawl and the remaining populations threatened by encroaching invasive alien vegetation and fertilizer runoff.

The dark-centred flowers aim to attract specific pollinators from the horsefly family (Tabanidae), but the specific interactions still require additional investigation.

The plants nearly always occur in seasonally moist wetlands which become dry in the summer months.