Hum, try this one (First in a series) "The Integral Trees" - https://en.wikipedia.org/wiki/The_Integral_Trees
An integral tree tuft is up to 50 kilometers from the tree's center of
mass. Thus, a tuft is either orbiting too slowly (the "in" tuft) or
too quickly (the "out" tuft) compared to the atmosphere, which is in
orbit at all points. The ends of the tree are therefore subject to a
constant gale-force wind that causes the ends to curve into the shape
of an integral symbol ∫ and pushes water and food onto the tufts, or
(less forcefully) onto the trunk, where the gravity-like tidal forces
pull the material out towards the tufts. Each tuft serves several main
purposes for the tree. First, the green foliage is photosynthetic,
providing the tree with energy from sunlight; second, the tufts are
where the tree produces its seeds; and third, various plants, animals,
and sundry other objects can become trapped in the tighter branches,
which gradually migrate toward the "treemouth." The treemouth, a pit
at the top of each tuft on the lee side of the trunk, is the integral
tree's root; water collected along the trunk flows down due to tidal
forces and is ingested by the treemouth. Tuft branches catch and
capture various things and animals in the wind and gradually, over the
course of years, migrate to the treemouth, where they and their catch
are absorbed by the tree for nourishment. Many other large Smoke Ring
plants have a scavenger/carnivore aspect similar to this, though with
somewhat different mechanisms.
The memories of the people involve Humans in Space Ships which feeds the last Book in the series.
Holding back vs Spoilers.