| schlumbergera | (n) South American epiphytic or lithophytic cacti, Syn. genus Schlumbergera |
| christmas cactus | (n) epiphytic cactus of Brazilian ancestry widely cultivated as a houseplant having jointed flat segments and usually rose-purple flowers that bloom in winter, Syn. Schlumbergera baridgesii, Schlumbergera buckleyi |
| crab cactus | (n) South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera, Syn. Schlumbergera truncatus, Zygocactus truncatus, Thanksgiving cactus |
| easter cactus | (n) spring-blooming South American cactus with oblong joints and coral-red flowers; sometimes placed in genus Schlumbergera, Syn. Schlumbergera gaertneri, Hatiora gaertneri |