Schlumbergera bridgesiiThanksgiving Cactus
Native to the coastal mountains of south-eastern Brazil.
This tropical cactus does not exist in the wild. It is a hybrid of Schlumbergera truncata and Schlumbergera russelliana that grow as epiphytes in the rain forests of South America, making their home on tree branches.
Source: Guide to Houseplants
The secret of good flower bud production involves temperature and dark (photoperiod) control. For best flowering provide 1) Bright light, 2) Night temperatures between 55° and 65° F, and 3) Long nights – thirteen hours or more of continuous darkness each day is required before flowering will occur. Long nights should be started about the middle of September and continued for eight weeks.
Source: Missouri Botanical Garden