Parmeliaceae Imshaugia aleurites Growth type foliose Chemical results: Cortex K+ yellow. Medulla K+ yellow, C-, KC-, P+ yellow-orange, UV- Occurs on wood, fence timbers and on acidic bark of conifers and birch. Small, whitish-grey thallus, the lobes much divided. Under surface white or pale tan with simple white rhizines. Abundant coralloid isidia spread to form +/- continuous crust. Apothecia rare, discs red-brown, spores simple. Similar: Parmeliopsis hyperopta is sorediate, UV+. Physcia clementei has narrower lobes, P-

Imshaugia aleurites
Holton Lee, Dorset. March 2013