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When: 2011-09-09

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

Who: Dave W (Dave W)

No specimen available

Damp leaf litter.


Proposed Names

8% (3)
Used references: B/B/F p. 519
Based on microscopic features: Spores much too small for Mitrula.
18% (2)
Used references: Preferred synonym according to Index Fungorum and MycoBank.

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
By: Irene Andersson (irenea)
2012-01-21 09:50:47 PST (-0800)

is officially recombined to Hypocrea by Holly Chamberlain 2004

since when podostroma is now hypocrea?
By: Jonathan M
2012-01-21 09:37:33 PST (-0800)
Thanks John.
By: Dave W (Dave W)
2012-01-21 06:11:14 PST (-0800)

Looks like we may call it leucopus. Like Irene said from the start… habitat is a key factor here.

By: John Plischke (John Plischke)
2012-01-20 11:07:46 PST (-0800)
By: Irene Andersson (irenea)
2012-01-18 01:03:40 PST (-0800)

that a couple of the authors of that paper were located at the Pennsylvania State University :-)

I think that the difficulties to tell alutacea and leucopus apart by microscopy, is one of the reasons why it took so long to separate them.
As you can see in the key, the main differences are colour, shape and habitat.

But further investigations in Scandinavia has revealed another new species, H. seppoi (described to be very small, with a less marked fertile head and turning darker with age). That’s why I beleive that there are more hidden species in your area too – the reason why I don’t choose the highest vote on Hypocrea leucopus.

Thanks Irene.
By: Dave W (Dave W)
2012-01-17 16:44:08 PST (-0800)

Judging from the paper, it seems that alutacea and leucopus were, until fairly recently, considered synonyms. This probably accounts for the absence of “leucopus” from the North American manuals. (I just checked B/B/F, Audubon, Phillips, Mushroom Expert, and Roody.) As Nathan proposes, the paper mentions that “Podostroma” types have recently been placed into Hypocrea. These stipate fungi bear little macro resemblance to the “cushions” one finds listed in the manuals under Hypocrea (see Audubon).

The ones seen in this obs were definitley not growing from wood. As I recall, there were patches scattered about in the leaf litter. Both Phillips and Roody report the habitat for alutacea as “wood”. So maybe what we see here is a different species.

I rumaged through my badly organized bags full of bottles which contain collections of dried mushrooms, and I found the collection seen here. (I do label these things.) If anyone is interested in studying this collection, let me know. Otherwise the bottle just goes back into the bag.

According to this paper
By: Irene Andersson (irenea)
2012-01-17 05:12:49 PST (-0800)

both Hypocrea leucopus and alutacea occur in North America,
but I’m sure you can have a few more undescribed species too.

Looks like there may be some lumping here.
By: Dave W (Dave W)
2012-01-17 04:46:19 PST (-0800)

My manuals are not here with me now. But I think P. alutaceum is the only Podostroma in B/B/F, Mushrooms of Northeastern NA… the big manual. I’ll check later this evening.

Bessette, Bessette and Fischer
By: Irene Andersson (irenea)
2012-01-17 00:29:23 PST (-0800)

Is that the volume that includes a total of 1500 species? How many other Podostroma species are listed there?
So far, we know 4 in Scandinavia (alutacea, nybergiana, leucopus, seppoi), I bet you have more.

Bessette, Bessette, Fischer lists the habitat
By: Dave W (Dave W)
2012-01-16 16:55:43 PST (-0800)

for P. alutaceum = H. alutacea as “on the ground among leaves and needle litter or on decaying wood.” The color range is given as “whitish to yellowish, becoming pale yellow orange to pale brownish orange in age.”

Not sure about alutacea
By: Irene Andersson (irenea)
2012-01-16 06:54:02 PST (-0800)

It should be a little darker and grow on wood