Epiphyllum - Unnamed
Unrooted cutting between 15-50cm. 
Epiphyllums are native to Mexico, also known as Phyllocacti. 
They require an average soil mixture with plenty of drainage.
Plenty of water in warmer weather, minimal water in winter and a shaded growing position for best results. 
When plants are in bud, a periodical feed with liquid fertiliser is beneficial.