With zero knowledge of botany, but curious enough to do some research on what I have observed. I would like to know the reason for this young sprout in the lower part of a 2 m long Hoya carnosa. I have not found this phenomenon on the Internet.
It exhibits a different kind (shape, color, thickness, consistency...) of leaves, thinner and clearer stem, suction cups ... I've read about foliar heterophilia, sports, ... but these phenomena don't seem to explain what I observe. I've also thought about parasitic plants. Could you provide some insight into this?
EDITED (after digging a bit): The roots are quite tangled, so it is difficult to identify if the wooden stem the sprout comes from is connected to the Hoya stems. If not, the creeper has managed to keep idle for ~5 years with no visible green parts.