Larch crab cups
| Larch crab cups | ||||||||||||
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Larch crab cups on a larch branch in Moscow |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Lachnellula willkommii | ||||||||||||
| ( Hartig ) Dennis |
The larch crab cup ( Lachnellula willkommii ) is a species of fungus from the Hyaloscyphaceae family .
features
Macroscopic features
The 1–3 mm, in exceptional cases also up to 5 mm wide, short-stalked fruiting body is cup-shaped when young, becomes cup-shaped to bowl-shaped with age and is strongly rolled up when dry. The fruit layer is smooth, yolk yellow to orange. The outside and the edge of the fruiting bodies are densely covered with white hairs.
Microscopic features
The species has elliptical-spindle-shaped, smooth, translucent (hyaline) spores that are 18–20 µm long and 7–8 µm wide. The asci are 120 µm long and 10-11 µm wide, they turn pale blue with iodine reagent , the spores are arranged in a single row (uniserat) in the ascus. The paraphyses are filamentous and septate, they protrude above the asci. The hair on the outside is translucent, thin-walled, septated several times and finely encrusted.
Species delimitation
Larch softwood hair cup : It looks very similar to the larch crab cup, but lives exclusively saprobion table on dead, barked branches of the larch. It has slightly smaller ascospores than L. willkommii , namely 14–22 long and 4–6 µm wide spores.
ecology
The larch crab cup lives parasitically on hanging branches of larch trees on or in the immediate vicinity of crab growths . The spores spread, the infection occurs on the leaf scars of the short shoots, sometimes also via frost wounds on long shoots. The mycelium growing in the cortex tissue down the trunk triggers the cancerous growths .
meaning
The larch Krebsbecherchen created especially to European larch to larch cancer , a form of tree cancer .
literature
- H. Butin : Diseases of the forest and park trees , Georg Thieme Verlag, 1983, ISBN 3-13-639002-4
- Josef Breitenbach, Fred Kränzlin (Ed.): Mushrooms of Switzerland. Contribution to knowledge of the fungal flora in Switzerland. Volume 1: Ascomycetes (Ascomycetes). 2nd, corrected edition. Mykologia, Luzern 1984, ISBN 3-85604-011-0 , p. 200.
- P. Schütt, HJ Schuck and B. Stimm: Lexicon of tree and shrub species. Nikol-Verlagsgesellschaft mbH, Hamburg 2002, p. 256