Pedilanthus bracteatus is a large member of this genus, as opposed to the much smaller Pedilanthus tithymaloides we featured late last year (and that made the Top Ten list too.)
Also known as one of the Candelilla plants in the Euphorbia family (Euphorbiaceae) from Mexico, it has the classic poisonous Euphorbia sap and an outer waxy coating that can be used to make candles. (That is why they call it candelilla, isn’t it?)
I’m just guessing here too but the other common name, Slipper Plant, refers to the shape of the flowers, right? They do look like they might be somewhat reminiscent of slippers or something…
Let’s see what the rest of the plant looks like, shall we?