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None of these is likely to be persoonii if they don’t grow with oak. Recent studies in an ongoing swedish project indicate that all Hygrophorus species are very particular about their hosts, so they could be two different species.
There aren’t many Hygrophorus sequences at Genbank, so I guess it will be hard to find any published studies yet.
In my books, the spore size in olivaceoalbus is extremely wide – could be because the descriptions include several species… (9)10-16(18) x (6)7-8.5(9) microns.
persoonii: 9-12 × 5-7, korhonenii: 10-14 × 5-7.5
One particular detail mentioned in persoonii, that is said to be lacking in related species, is “extracellular granules and incrusting pigment” in pileipellis, turning dark blue-green with KOH.
Is the host tree and slight difference in cap color the only difference between them? Or are there micro differences as well?
We get two in CA, this one under spruce
And this one in mixed conifers (Douglas-fir, fir and spruce)
Largent called them all H. persoonii…
maybe olivaceoalbus after all.. which I suspect could be a group with some still unnamed hidden forms or species.
but rather brown than grey…
brown and growing with oak/hazel: persoonii
grey and growing with spruce: korhonenii
I don’t think it’s olivaceoalbus
Created: 2012-09-16 10:19:18 PDT (-0700)
Last modified: 2012-09-17 06:49:28 PDT (-0700)
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