SINCE 1828
Christmas cactus
nounDefinition of Christmas cactus
: a branching Brazilian cactus (Schlumbergera bridgesii synonym S. buckleyi) having flat jointed stems with scalloped margins and showy usually red, pink, white, violet, or yellow flowers
also
: a related cactus (Schlumbergera truncata synonym Zygocactus truncatus) or a hybrid of this and the Christmas cactus
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