Cactus refers to a large number of branches with drooping branches. Its branches are flat and fleshy. Each branch is oblong or leaflike. Each side of the branch has 1 to 2 Blunt teeth, with the top cut.
Crab claw orchid has no leaves, its stem does not have this, there are many branches, usually hanging, its old stem is lignified, slightly cylindrical, its young stem and branches are flat, each node is rectangular circular or obovate, about 3 to 6 cm long, about 1.5 to 2.5 cm wide, bright green, sometimes a little purple.
Cactus refers to the flowers growing on the top of the branches alone, the Corolla is neat, there are many colors, including purple, white, red and so on.
Crab claw orchid's flower grows alone on the top of the branch, is rose red, 6 to 9 cm long, the two sides of the flower are symmetrical.