I'm new with epi's, just to tell you...My 3 young epiphyllum oxypetalums (Night Blooming) have each put out a stem straight up into the air, with the stem tips a little bit flattened. Now I have three green "sticks" shooting up from the pot, each one no more than 1 foot long. What are these stems anyways? I mean, will these stems carry flowers or new leaves or something? Thanks for any help!