DISILLUSIONED

Quick picture of trees.
A memory from childhood
what to write?
The moss was very obvious
so I looked it up.

If you're lost in the woods without a compass, look for moss - it shuns the sun, and therefore only grows on the north side of trees.

REALITY
It may be that in certain places, and under certain circumstances, moss will be noticeably more present on the north than the south side - but not consistently enough to advise hikers to leave their compass at home.

Mosses will grow on the north, south, west and east of trees (and, indeed, buildings), wherever there is enough moisture to sustain them - and that depends on various factors, such as prevailing winds, and not exclusively on shade.