Naples, Fl: This started as a small cutting a few years ago in the boots of Sabal palmetto. The cactus leaf/stem is quite flat with terminal flowers. The image was made at 530PM; it is possible that, like Cereus, the flowers are full at night.
Anyone have an idea what it is?
Flowering cactus vine- of some sort?
Many of the Epiphyllums have Cereus in their parentage. Epi. Oxypetallum and Epi Strictum are the two I am familiar with, but I'm sure there are more. You might want to peruse the Orchid Cactus forum for more info. and pictures.
Looks like Pitaya to me ! :p Miam !
(Dragonfruit)
They take 7 to 10 years for one to start flowering, wait for the fruits, keep the birds away and taste its most amazing fruits ! :)