11.   A tree root flexed, then was still.

12.   Before this the tree roots held the soil in place by soaking up the heavy rain and letting it go slowly.

13.   An elaborate tree root became a garden stool.

14.   And tree roots and root grafting can extend across several back yards.

15.   At Morningside Playground in Harlem, four of six swings for little children were missing, and tree roots had rearranged benches at weird angles.

16.   A shot of intertwined tree roots, for example, suggests nothing so much as a nest of writhing serpents.

17.   All of this is an impediment to foot travel, as hikers must step frequently over rocks and gnarly tree roots.

18.   But then truffles grow underground, on gnarled old tree roots.

19.   Cash said the lawsuit was prompted over the way the company notified its customers of a policy change that eliminated coverage for drainage clogs caused by tree roots.

20.   Cutting tree roots to put in a sprinkler system can damage or even kill the trees.