Philodendron billietiae x atabapoensePhilodendron billietiae x atabapoense at a glance: Philodendron billietiae atabapoense combines the long, elegant outline associated with billietiae type foliage and the darker maroon backed drama seen in atabapoense, producing a hybrid that looks considered from every angle. The leaves are large, elongated, and dark green above, with a richer underside that becomes more visible as the plant climbs and moves. It responds well to vertical support and