Collection location: Lower Trenta Valley, East Julian Alps, Posočje, Slovenia [Click for map]
46.3801° 13.7469° 625m
Habitat: Mixed wood, dominant trees Picea abies, Fagus sylvatica, Fraxinus ornus, Fraxinus excelsior, Corylus avellana; at the foot of steep mountain slope, southeast oriented terrain, locally almost flat ground consisting of overgrown calcareous scree, rocks and boulders; in shade, partly protected from direct rain by tree canopies, average precipitations ~ 3.000 mm/year, average temperature 7-9 deg C, elevation 625 m (2.050 feet), alpine phytogeographical region.
Substratum: large, dead, rain soaked trunk of Picea abies in the last stage of disintegration lying on ground.
Place: Lower Trenta valley, next to the Soča trail between Markov bridge and Trenta village, right bank of river Soča, East Julian Alps, Posočje, Slovenia EC
Comments: Most sources consider this species as rare, however in Bovec region it doesn’t seem so. I’ve found it several times. One could consider it as frequently overlooked species partly because sporocarps are really small and because they are very ephemeral. However, on other side, it usually thrives gregariously in hundreds of sporocarps, which is, because of their white color contrasting to usually darkly colored rotten wood, quite easy to observe. This interesting fungus grows in symbiosis with algae (Coccomyxa) similar to lichens. While in true lichens algae are internal to fungi body, algae associated with Multiclavula mucida grow externally to the fungus on the same substratum. Algae can be observed like a thin layer of something green spreading around fungi sporocarps. M. mucida is also a rare example of symbiosis of a basidiomycete and algae. Vast majority of lichens is an association of ascomycete with algae.
Growing in groups of many fruit bodies; sporocarps up to 4 – 7 mm high and about 0.8 mm in diameter; most sporocarps are single, but some are branched into 2(max 5, one sporocarp found) tips; SP faint, whitish.
Measured spores are definitely wider than they should be for M. mucida. They with certainty belog to this observation because they come from tiny but clear spore pint. All sources I found consistently state that spore width should not exceed 3.0 (3.2) μm. According to the key (Ref.:(4)), only three other Multiclavula species (among 13 treated) fit to the spore dimensions measured: M. fossicola, which doesn’t have hypha clamps, M. coronilla, which is terrestrial and M. clara, which is not white but pale orange. Therefore measured spore width remains a secret to me. Any comment wellcome.
Nikon D700/Nikkor Micro 105mm/f2
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Created: 2014-01-06 12:22:17 CST (-0600)
Last modified: 2014-01-06 12:22:31 CST (-0600)
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