Fenestraria rhopalophylla, Fenestraria aurantiaca

On each leaf there is transparent window-like area at the top, it is for these window-like structures that the genus is named. In the wild, the plant grows mostly buried by sand.

Subspecies:

Fenestraria rhopalophylla subsp. rhopalophylla with white flowers

Fenestraria rhopalophylla subsp. aurantiaca with yellow flowers