The biggest difference between a Christmas cactus and an Easter cactus is when they bloom. Each blooms near its respective holiday. Christmas cactus have scalloped stem segments. Thanksgiving ones have between two and four pointy teeth along the edges of leaves and Easter cactus have rounded teeth. They are members of the Zygocactus truncatus family which is native to Central and South America. You might also see them referred to as ‘Jungle cactus’.