At this year's Christmasworld in Frankfurt, Germany, decorations made from natural materials were everywhere: moss and felt baubles, versions wrapped in hemp string and ornate pendants made from ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, ...

Spanish moss is a "very opportunistic" plant in that its seeds can simply blow onto tree branches, germinate and grow into long, gray strands. It's random where it finds a host.

This April 2, 2019, photo provided by the Forest Preserve District of Will County, IL, shows moss growing at the base of a tree at Raccoon Grove Nature Preserve in Monee, IL.

Should you worry about lichens, moss, algae on trees? Now that deciduous trees are bare, you might be noticing the nuances and irregularities on their trunks and branches. Jessica Damiano.

This April 2, 2019, photo provided by the Forest Preserve District of Will County, IL, shows moss growing at the base of a tree at Raccoon Grove Nature Preserve in Monee, IL.