Rust on limbs
Asked May 11, 2019, 12:17 PM EDT
This Spring, I found a number of limbs on trees in my yard that had an orange colored organism on them. Anything to worry about?
Linn County Oregon lichen on trees
Thank you for the images of several different kinds of lichen,including a bright orange one, commonly found on slow-growing trees and shrubs.
Lichen is very common throughout the moist portions of Oregon. Some forms are quite fanciful. (See "What are lichens" https://www.fs.fed.us/wildflowers/beauty/lichens/whatare.shtml
Also see "Lovely lichens lurk in your woodlands" http://blogs.oregonstate.edu/treetopics/2019/04/04/lovely-lichens-lurk-in-your-woodlands/