Lichen grow on many kinds of surfaces including trees, soil and rocks. The kinds that land on trees have found a stable surface that has sufficient sunlight, moisture, and minerals to sustain them.

Last October at the Trees of the Chiricahua’s Conference in Portal, Arizona, I learned something new about lichen. You may have heard that lichen are interesting because they’re made up of a ...

Q: I have a 27-year-old "Snowdrift" crabapple tree in the front of my home. It looks to have lichen on it - it looks like greenish-gray leaf-like spots all over the tree. I have been pruning it ...

Lichens form on a variety of surfaces, such as rocks, soil, and fallen logs, as well as on the bark of living trees. When lichens are noticed on trees, they are sometimes mistakenly thought to be ...

The presence of lichen or moss on backyard trees can understandably be concerning at first. Lichen is a combination of algae and fungus that lives on any number of solid, undisturbed surfaces ...

Lichens can also be found on non-living surfaces such as rock, tree stumps and even brick foundations. The spread of lichens is not the primary cause for the decline in growth or death of shrubs ...

An attempt has been made to save one of England’s rarest lichens by transferring it from a fallen oak to nearby trees, the National Trust said. The lungwort lichen (Lobaria pumonaria) is a ...

What the lichen growing on Oregon's trees can tell us about air quality. Clip: Season 22 Episode 2210 | 8m 21s Video has Closed Captions ...

Q: I am worried about the grayish-green, flaky, roundish spots I am seeing on big tree trunks and branches this spring. I can scratch it off with my fingernails. I think that it is killing my trees.