Fused leaves on phal. pulcherrima

[MCD]

Not sure how unusual this is, but looks like this pulcherrima leaf is actually two leaves fused together along their edge. Always thought it looked odd, with a "W" profile (2 valleys and a middle ridge), and at a 90 deg. angle from what you'd expect. The position of the leaf that follows also suggests that this is a 2-in-1 leaf.

Found this intriguing, so thought I'd share.