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Point taken. Microscopic identification is more conclusive, without doubt.
And yeah, H. auriscalpium and H. tremula (=H. geogenia) are very similar. I wonder what the various species ranges are.
the microscopical features but unfortunately there’s still a taxonomic tohuwabohu here. BTW, I found a similar one yesterday in a flowerpot and I can’t decide whether it is H.geogenia/petaloides or H.auriscalpium …
I know you are asking Irene, but from her comment it seems that she was asking how to distinguish Hohenbuehelia petaloides as well…
The most distinct feature is suggested in the species name- petaloid(es).
This species can be distinguished from similar species (i.e. H. angustata) by its inrolled funnel shape.
As you also pointed out- it is one of the few species in the genus which prefers woody debri or soil rich with dead plant material, over intact wood.
This species (as well as a few others) of Hohenbuehelia is easily distinguished morphologically from members of the genera Panus and Pleurotus by the very crowded gill spacing.
Panus fruiting bodies are usually far more tough and woody than either of the other genera.
I’m reviewing observations of H. petaloides for inclusion on the EOL page. In this case, the habitat and the appearance match Arora well. To Irene I’d ask what other species are there to chose from and how do you distinguish them?