Not actually unusual ------ to have a Dendrobium discolor bulb growing among old woody stems of some garden plant.
It just sort of shows how 'tough' some orchids (plants) are. Such as --- if bulbs had somehow broken off from a plant after growing of a pot, and the pot relocated ------ the broken-off bulbs can possibly just make it and survive when the conditions are ok.
After inspecting the area ----- I can see other apparently dry bulbs in the area. The one with the leaves, and some nearby (with no leaves). There is actually no orchid pot anywhere near this region.
The conditions here are tropical. And the lawn pop-up sprinklers waters the whole area where this bulb is located. I'll just monitor the state of it, and see how this one goes. I think it has been going quite ok for quite a while already there. It was under the radar. I might later put it in an orchid pot anyway.
Google drive links:
Pic 1
Pic 2