Christmas Cactus Vs Thanksgiving Cactus

Thanksgiving cactus and Christmas cactus are from the same genus, but they are not the same plant. 

The shape of the leaf (clade) is the most common way to tell the difference. 

Bloom time and the shape and color of the flowers are also good indicators. 

Christmas cactus is a lot more rare than Thanksgiving cactus, but they are often falsely advertised as Christmas cactus!