Don't listen to me, LOL. I always heard that Epiphyllum didn't have spines but perhaps some varieties do?
Well, I googled and this site says that Epiphyllum for the most part are spineless except as young seedlings:
http://cactiguide.com/cactus/?...
The same site states that some Selenicereus are spineless while others have tiny hairlike spines:
http://cactiguide.com/cactus/?...
My Selenicereus anthonyanus has sporadic tiny spines along the stems but those flower tube thingies are very spiny!
