Mistletoe Cactus (Rhipsalis)

The Mistletoe Cactus is light, slim and trailing, a rare thing among cacti. Though you won't find cactus spines along with its fronds if you squint, you can see tiny bumps. 

It’s epiphytic, in its natural habitat it grows attached to branches or trunks of trees. As a houseplant, it’s great in a hanging pot.