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When: 2019-05-31

Collection location: Ricketts Glen State Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Growing directly from a large log (probably hemlock).
Spore dimensions (6-7 × 3.5-4) appear to favor K. lignicola, as does the coniferous setting (mostly hemlock in this area).
The distinction between K. marginellus and K. lignicola escapes me…?


Proposed Names

58% (1)
Recognized by sight
29% (1)
Recognized by sight: Habitat seems to favor this over K. marginellus.
Based on microscopic features: Spore dimensions.

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= Observer’s choice
= Current consensus


Add Comment
Second that thank-you.
By: Dave W (Dave W)
2021-05-24 19:00:21 PDT (-0700)

Champignons du Quebec (both in words and photos) provides support for Jacob’s analysis about the stipes of K. lignicola being both thinner and darker. Also, C du Q does not emphasize conifer vs. hardwood for either species. K. marginellus is a very common species in my area during May.

By: Dušan (RenegadeMycologist)
2021-05-24 06:46:12 PDT (-0700)

I appreciate it.

By: Jacob Kalichman (Pulk)
2021-05-24 06:36:26 PDT (-0700)

K. mutabilis: tiny prickles along the stem from the ring (zone) to the base
K. lignicola: usually skinny, silky stem, strongly darker from the ring zone to the base
K. marginellus: bedraggled stem, almost unicolor

By: Dušan (RenegadeMycologist)
2021-05-24 04:50:43 PDT (-0700)

Sorry for all caps, but what is the real difference between 3 Kuehneromyces species ? Is there some random deciding going on MO, cause I see 0 pattern ?
Macro and micro features constantly overlap, and now pulk goes around changing names with 100% certanity and 0% elaboration…My experience is lacking so you are probably right, but can anyone shed some light ?

So lignicola can’t grow on hardwood, but the rest can grow on softwood ? And marginellus lack scales ? Or what is going on in this infernal genus ?!

Thanks Dave, or to anyone responding