description Abortiporus biennis Overview
Abortiporus biennis, commonly called the blushing rosette, is a variable polypore fungus that may form fan-shaped brackets, rosettes, short-stemmed clusters, or irregular masses. Its pale cap and maze-like pores often turn pinkish or reddish brown when bruised, and fresh specimens may exude red droplets. It grows on buried roots, stumps, logs, and wood of deciduous trees in Europe and North America, where it acts as a decomposer and can cause white rot in living or dead hardwood, as documented in the [species account](https://linnet.geog.ubc.ca/Atlas/Atlas.aspx?sciname=Abortiporus+biennis).
help Abortiporus biennis FAQ
Why is Abortiporus biennis called the blushing rosette?
Abortiporus biennis can form rosette-like clusters as well as brackets and irregular masses. Its pale surface often turns pinkish or reddish brown when bruised, creating the blushing effect.
What shapes can Abortiporus biennis take?
The species is highly variable in form. It may produce fan-shaped brackets, rosettes, short-stemmed clusters, or irregular masses with maze-like pores.
Do the pores of Abortiporus biennis change color?
Yes, fresh tissue and pores can develop pinkish or reddish-brown bruising. This reaction is one of the useful field features for recognizing the blushing rosette.
Where does Abortiporus biennis grow?
It is a polypore associated with decaying wood and can appear as fresh, soft fruiting bodies on woody material. The supplied description emphasizes its variable bracket and rosette growth rather than one single host tree.
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