Climacocystis borealis

Climacocystis borealis is a polypore that lives in conifer trees. It has one-year-old wedge-shaped fruit body. It is honey-yellow when young and grows lighter with age. The lower surface pore layer is labyrinthine.

It has a pleasant scent and its colour changes from light to yellow in the rain. It forms spectacular multi-fruit body growths that make it easy to recognise. Its prevalence varies greatly from year to year.

Climacocystis borealis grows in coniferous forests, in spruce stands and on decaying trees. It is wood decayer which thrives on old, sturdy, decaying spruces. Climacocystis borealis is a common species of old spruce forests and the substrates suitable for the species are formed by adding decaying wood, for example, by leaving retention trees and stumps in the forests.