Kuntze (1898) Lenzites warnieri is a species of fungus in the family Polyporaceae found in parts of Europe, Asia, and northern Africa.

Michel Durieu de Maisonneuve and Camille Montagne classified Lenzites warnieri in 1860, on the basis of a find from northern Algeria.

Lenzites warnieri is closely related to various species of the genus Trametes, but their exact taxonomic positions are to date unresolved.

The type specimen came from Algeria, where Durieu and Montagne collected it from the trunk of an elm on the grounds of the retirement home of the French physician and politician Auguste Warnier.

1880 was for a long time considered a valid name for L. warnieri in Europe, although its type was much smaller than the one by Durieu und Montagne.

[4] Unlike L. warnieri, Daedalea quercina has a maze-like hymenophore, causes brown rot, and infests only oaks.

[7][8] The authors of one DNA study published in 2011 suggested that Lenzites should be considered a synonym of Trametes, together with the genera Artolenzites, Coriolopsis, Coriolus, Cubamyces, Cyclomycetella, Poronidulus, Pseudotrametes and Pycnoporus.

[9] The fruit body of Lenzites warnieri is a flattened, semicircular or two-part cap divided through a small recess.

The surface of the young fruit bodies has a velvet texture, but it becomes bald and smooth in maturity and produces small humps or warts.

The trama has a tough leathery and corky consistency, but is relatively thin and does not show a definite transition to the gills.

[17][18] There were further findings in northeast Italy and on the opposite side of the Adriatic Sea, in the Sava-Danube area in Serbia and Croatia.

Further to the southwest there were three findings on the Macedonian Vardar, and further three in the Bulgarian eastern Rhodopes[20] and on the Black Sea coast near Primorsko.

[22] In the area of the former Soviet Union, there were findings in the Ukrainian Carpathians and Bilhorod-Dnistrovskyi, in the Georgian Gagra, Armenian Ander and Turkmenistan.

In the interglacial periods of the Pleistocene the habitat reached the areas of today's continental-temperate climates, as was validated by a fossil find in Thuringia from the Eemian.

The fungus is relatively winter-hardy, but it is sensitive to drops of temperature during summer, which likely explains why it is often found only on the sunny side of tree trunks.

By doing so, the lignin is degraded in the infested zones, and the wood becomes fibrous, bleaches, and loses strength.

The mycelium of the fungus populates the host tree and produces numerous fruit bodies in autumn.