41.   Poorly ventilated crawl spaces, or those with remnants of tree roots or construction debris, can also give Poria a point of entry.

42.   Sao learned as a girl the traditions of rural Cambodia, where she was prescribed boiled tree roots for fever.

43.   Short of digging up and removing the tree roots, is there anything I can do to prevent these mushrooms from sprouting every fall?

44.   So far this year, tree roots are still the most common obstruction.

45.   Some tree roots are exposed because of erosion.

46.   That is, they regularly mistake common objects, such as tree roots, rocks, shrapnel, bullets and other debris, as mines.

47.   The brittle volcanic rocks are absolutely black, full of fissures, shapes resembling twisted tree roots, and large gaps you must leap over.

48.   The cliff is a sheer drop, smooth as glass, topped by a ragged edge of broken soil and tangles of tree roots and pipes.

49.   The girls picked their way over tree roots and pine needles to reach the tents that would be their summer homes.

50.   The rain washed away much of the topsoil, leaving behind gullies and exposing rocks and tree roots.