Lichen, Algae, and Moss on Trees University of Maryland Extension
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![](https://extension.umd.edu/sites/extension.umd.edu/files/styles/optimized/public/2021-03/hgic_trees_algae_and_lichens_on_tree_trunk--2072-094-slide.jpg?itok=klbHRCnM)
Lichen are living organisms composed of a fungus and algae living in a symbiotic relationship.
![](https://bygl.osu.edu/sites/default/files/inline-images/lichen22_2.jpg)
This Symbiotic Organism took a “Lichen” to this Tree!
![](https://www.frontiersin.org/files/Articles/503192/fmicb-11-00268-HTML/image_m/fmicb-11-00268-g001.jpg)
Frontiers Microbiome in Cladonia squamosa Is Vertically Stratified According to Microclimatic Conditions
![](https://www.rover.com/blog/wp-content/uploads/2014/12/Bilbo-Baggins-Hobbit-Pug.jpg)
215 Rare Dog Names That Are Unique, Unusual, Uncommon, 42% OFF
Why does moss grow on the north-facing side of trees? - Quora
![](https://static.toiimg.com/thumb/msid-63028385,width-1070,height-580,imgsize-108121,resizemode-75,overlay-toi_sw,pt-32,y_pad-40/photo.jpg)
215 Rare Dog Names That Are Unique, Unusual, Uncommon, 42% OFF
![](https://i.pinimg.com/1200x/e2/54/2f/e2542f74bc3e3447e35749102b1a9961.jpg)
215 Rare Dog Names That Are Unique, Unusual, Uncommon, 42% OFF
![](https://i0.wp.com/mgnv.org/wp-content/uploads/2020/01/BEST-BARK-COLLAGE.png?ssl=1)
Identifying Trees by Their Bark
![](https://www.researchgate.net/profile/Richard-Armstrong-17/publication/322142360/figure/fig2/AS:11431281218613260@1705653904750/Morphological-changes-in-thalli-of-the-crustose-lichen-Rhizocarpon-geographicum-L-DC_Q320.jpg)
PDF) Adaptation of Lichens to Extreme Conditions
Yellow moss or fungus on tree trunk - Ask Extension
![](https://8billiontrees.com/wp-content/uploads/2023/09/Huge-Tree-Trunk-Peeling.webp)
What Tree With Peeling Bark Is This? 6 Trees With Bark That Peels (Pics, Zones)
Question about health of tree - Ask Extension
![](https://mgnv.org/wp-content/uploads/2019/01/12.-moss_probably_orthotrichum_species_on_maple_bark_apr_mmf.jpg)
Are You Lichen the Bark? Beautiful Bark
fungus on cherry and dogwood trees - Ask Extension
![](https://www.biorxiv.org/content/biorxiv/early/2022/09/02/2022.01.06.475074/F2.large.jpg)
Phylogenomics reveals the evolutionary origin of lichenization in chlorophyte algae
![](https://danielgreenwood.files.wordpress.com/2022/12/chesworth_8-12-22_djg-03.jpg)
Lichens – Daniel Greenwood
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