With zero knowledge of botany, but curious enough to do some research of what I observe, I would like to know the reason for this young sprout in the lower part of a 2 m long Hoya carnosa. I did not find this phenomenon after looking for it 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.