Back in October, Plantlady, was talking about not being able to find P. domesticum and it might be P. hastatum. If you really want to know what it is, you're going to have to let them grow up a support so they get mature leaves. Those leaves are still juveniles and won't take on their adult shape until they get to climb. P. domesticum is 'hastatum' in horticulture. It is listed in 'Exotica' as domesticum with hastatum in brackets. But, still, the best way to know for sure, is to let the plant grow up a support like a moss pole, give it good drainage and bright light. I'll try and post a picture with my reply. Just remember everyone, that vining philodendrons will change leaf shape as the plant get higher on a support and most likely larger. (click on the picture for a full view of the leaf)
