Ask-a-Dave's-Gardener: Can someone tell me if it's roots or trunk?, 2 by Molloch

Molloch wrote:
Hello all, I am new to this, I found this beaute in Honduras and I am not sure if what I see are roots or trunk or both or how to plant it now.

I found found it under a 90 years old Dyospiros blancoi mabolo tree but I am unsure it's one as the seeds I saw look different (more tomatoe-like). If someone knows, I would appreciate too.

I was planning to put it in a Turface/Tokoname mixture and feed it orchid food. Grow it indoor bonsai style. Does that make any sense?

Also, it's covered with some fungi. Should it be cleaned or is it helping it?

The last picture is how I thought of planting it thinking roots must grow before trunk although there is a division where it starts growing which is going in opposite directions making me think one could be trunk, the other root ... even though the surface on both segments looks very much the same.