• Proposed
  • Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Pycnoporellus alboluteus (Ellis & Everh.) Kotl. & Pouzar

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Scientific name
Pycnoporellus alboluteus
(Ellis & Everh.) Kotl. & Pouzar
Common names
Пикнопореллус бело-желтый
Orange sponge polypore
oranžovec bledý
pomarańczowiec bladożółty (oranżowiec bladożółty)
storporig brandticka
baltdzeltenā egļpiepe
Liibuv roostetorik
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Under Assessment
Proposed by
Tatyana Svetasheva
Tatyana Svetasheva
Izabela L. Kalucka
Bruno Boulet, Anders Dahlberg, Inita Daniele, Boris Ivančević, Michael Krikorev, Vladimír Kunca, Kamil Kędra, Tatyana Svetasheva
Comments etc.
Irja Saar, Iraida Stavishenko, Else Vellinga, Debbie Viess

Assessment Notes

Taxonomic notes

Why suggested for a Global Red List Assessment?

The species is declining on a global scale due to decreasing areal of virgin or old growth spruce and fir forests and a poor ability to spread and establish in forest after clearcutting. It is redlisted in five European countries. (This proposal and the main information belongs to Dr.Ivan Zmitrovich, Komarov Botanical Institute, Saint-Peterburg)

Geographic range

The boreal and mountain parts of Europe, Caucasus, Asia, North America.

In Russia it’s known in 11 regions. European part: Lenigradskaya, Arkhangelskaya, Tverskaya oblasts; Krasnodar Kray, Republics Karelia and Karachaevo-Cherkesia;  Ural: Perm Kray, Sverdlovskaya oblasts, Republic Komi;  Siberia: Tomskaya and Tumenskaya Oblasts; Far East: Kamchatka

Population and Trends

The species exclusively occurs in boreal and mountain old-growth forests of spruce (Picea abies, P. obovata, P. glauca, P. engelmannii, P. pungens) and fir (Abies alba, A. concolor, A. nordmanniana, A. lasiocarpa) with the majority of the European localities known from Finland, Poland, Czech Republic, Montenegro, Georgia, Ukraine, Russia. Forests where it occurs are primarily threatened by clearcutting.
The species seems to have poor ability to spread and establish in forest after clearcutting. The fungus is gravitating to moist conditions of old forests with abundance of huge overmossed fallen logs on various stages of decaying, therefore, it absent in wide range of exploiting forest enterprises.

There are about 50 known localities in Russia:  European part ~ 22, Ural ~ 23; Siberia: ~3; Far East: ~2 (Khermansson Ya., 1997, Kosolapov D.A., 2008,  Mukhin V.A., 2008;Stavishenko, 2002 , 2006, Ruokolainen A., Manninen O. 2014.,  Red Data Book…., 2013; database of Komarov Botanical Institute)
Evaluation period 50 years = 3 generations (according to the recommendation of Dahlberg & Mueller, 2011)

Criterion C2a can be appropriate

Population Trend: Uncertain

Habitat and Ecology

This is xylosaprotroph which causes brown rot of presumably coniferous wood. As substrata were mentioned Picea abies, P. obovata, P. glauca, P. engelmannii, P. pungens, Abies alba, A. concolor, A. nordmanniana, A. lasiocarpa, Larix sp., Pinus sp., Pseudotsuga sp., Tsuga sp., rarely deciduous trees, viz. Populus tremuloides, P. trichocarpa, Alnus sp.
The fruitbodies appears on large decorticated trunks in their central parts, as a rule on log underside. On the logs closely attached to the ground, the fruitbodies form on the lateral or even the upper sides, then consisting of ruff-like nodules. Most often the they emerge from fissures or crefts in the trunk, or from under the bark at the edge of decorticated wood.
The habitats of this fungus are relief depressions which are well-drained throghout the growing season, housing temporary rivers during the spring, and a thick, long-lasting snow cover in the winter.
The vegetation on these slopes is most lurixant and consisted by productive spruce or fir, intermixed with aspen and some other deciduous trees and having regular gaps enriched by fallen logs of various decay stages.
The American authors repeatedly report that the species grows near the receding snowline, or during the winter and spring on snow-covered trees. In Europe the growth period was registered beginning in early autumn.

Boreal Forest


Forests where it occurs are primarily threatened by clearcutting.

Conservation Actions

Setting aside spruce and fir forest reserves where the species have good populations. At these forests, natural or prescribed burning should be considered to maintain desired forest dynamics. The removing of fallen logs in served areas should be prohibited.

Research needed

Use and Trade


Dahlberg A & Croneborg H. 2003. 33 threatened fungi in Europe. Complementary and revised information on candidates for listing in Appendix I of the Bern Convention T-PVS (2001) 34 rev 2.
Hintikka V. 1970. First record of Pycnoporellus alboluteus in NW Europe. Karstenia 11: 33-34.
Niemelä T. 1980. On Fennoscandian polypores 7. The genus Pycnoporellus. Karstenia 20: 1-15.
Tortić M., Jelić M. 1974. New European records of Tyromyces kmetii and Pycnoporellus alboluteus (Polyporaceae) and the identity of Irpex
woronowii Bres. Česká Mykologie 28: 26-34.

Khermansson Ya.  Representatives of Polyporaceae s.l. and some other genera of Aphyllophorales in Pechoro-Ilychsky Reserve// Flora and vegetation of Pechoro-Ilychsky Reserve. Ekaterinburg: 1997. C. 326-365.(In Russian)
Kosolapov D.A. Aphyllophoroid fungi of middle-taiga of European north-west Russia. Ekaterinburg, 2008. C. 56. (In Russian)
Mukhin V.A., Kotiranta Kh., Uchakova N.V. Polypores of Beringia sector of Holarctica // Fundamental and applied problems of botany at the beginning of XXI century: Proceedings of the All-Russian Conference (Petrozavodsk, September 22-27, 2008). Part 2: Algologia. Mycology. Lichenology. Bryology. Petrozavodsk: Karelian Research Centre, 2008.P. 135-137.(In Russian)
Parmasto E.Kh. To mycological flora of Komi ASSR// Proceeding on botany: scientific notes of Tartu University, 1963. V.136. C. 103-129 (In Russian)
Red Data Book of Karachaevo-Cherkesia Republik. Cherkessk, Nartisdat,2013. 316 p (In Russian)
Ruokolainen A., Manninen O. 2014. Aphyllophoroid fungi of Zaonezhye Peninsula. Biogeography, landscapes, ecosystems and species of Zaonezhye Peninsula, in Lake Onega, Russian Karelia. Reports of the Finnish Environment Institute. Vol. 40. Helsinki. P. 221-244.
Stavishenko I.V. Rare species of xylotrophic fungi of Vishersky Reserve // Modern Mycology in Russia: Abstracts of 1 congress of mycologists of Russia. Moscow, 2002. C.98-99. (In Russian)

Known distribution - countries

Regional Population and Trends

Country Trend Redlisted