This species comes from Brazil and it is classed as a tropical/subtropical plant, but it can take low temperatures, down to 5°C, which has surprised me. It is also a plant that will flower in the winter; the pictures below were taken early February. It produces masses of white flowers with a red centre and they last a few days. Unlike some rhipsalis, it produces few berries. Perhaps it needs to be hand-pollinated as perhaps there are not enough insects in the greenhouse in the winter.
It is very easy to propagate by cuttings which need to be left for about a week to dry before being put in the soil or rooting medium. As you can see from the picture, it will grow into a fairly large plant, so give it some space. I grow it in shade and it does very well there; maybe it can take more sun, but I have not tried that yet.

Rhipsalis elliptica

Rhipsalis elliptica

Rhipsalis elliptica

Rhipsalis elliptica detail

A new species on my list that comes from the Ilha Grande, an island north of the Seta Quedas Falls in the state of Parana, Brazil. Synonym: Rhipsalis teres var. heteroclada. As with most Rhipsalis, keep it out of full sun.

Rhipsalis heteroclada