Hatiora gaertneri (Cactaceae), the Easter Cactus or Whitsun Cactus, is a South American epiphytic species, meaning they grow in trees in more wet/humid regions. The stems of these species may be either flat and leaf-like or round in cross section.
In the wild, the Easter cactus can be found in Parana, Santa Catarina, Brazil . This species is cultivated as ornamental. Its flowers are actinomporhic (symmetrical), scarlet-red, and 4.5-7.5 cm in diameter .