fungoid

sienimäinen Of, pertaining to, or resembling a fungus.
1955, William Golding, Faber & Faber 2005, p. 142:

He had no hair on the front of his head at all so that the sweep of bone skin, daunting in its fungoid pallor, came right over above his ears.

He found the suspicion correct which supposed the tree branched from one great root, like a candelabrum; the fork, though stained and slimy with green fungoids, was quite near the ground, and offered a first foothold.