No. 87 - Findings from the Rhine-Main region . Very common, but only a regional distribution Art almost exclusively on field maple (Acer campestre). D. acerina is one of the overlooked species and is the adult field maple trees in the Rhine-Main area to look frequently. The chalk-white to white-gray spots, sitting on the already slightly detaching bark disks and in the crevices and convey the impression of a color splash Kalkbrühe. 
The thin, between 0.1 - 1 mm thick and 1-10 cm long pads can not come off. They are irregularly shaped and can grow together into larger areas. The surface is smooth to slightly rough, warty, while under the magnifying glass until it is mealy feinfilzig. 
The species is sufficiently defined by their micro-characteristics: It has large, broadly elliptical spores with a length of up to 13μ, many Dendrohyphidien overgrazing, monomitische hyphae with buckles and vesicular-keulige Zystiden with some worm-like appendages. However, these structures can be seen only on well-stained or Quetschpräparat Phase contrast. The striking Zystiden are also available only in some collection. The genus Dentrothele in Europe, currently has a Dzd. species, of which 3 are shown in West Germany. A current key brought out in 2010 Gorjon & Bernicchia in Nowa Hedwigia Band 90th A translation of Christopher Hahn can be found in the Bavarian-Mycological Society Forum in February 2010.
possibilities for confusion: Macroscopically identical and differed only by small elliptical spores D. alliacea. It grows on deciduous trees - including maple - but not on the field maple. The very rare D. commixta is schnallenlos and grows on the bark older oaks. At various deciduous trees may still occur on another rare species: D. griseocana described from Poland. It is zweisporig.
Who the maple-tree-wart fungus has ever seen, is it always easy to recognize. Mature field maple trees - among other things identified by the rounded edges of the leaf palmately divided leaves - often found in lowland forests, to rivers and streams, at forest edges, interspersed with oak hornbeam forests but also in parks and facilities. The presented images were photographed in December 2010 and January 2011 in Frankfurt and in Niedwald Goldstein Park Frankfurt-swan home.
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