Observation 211578: Boletus longicurvipes Snell and A.H. Smith
When: 2015-07-25
No herbarium specimen

Notes: Oak pine woods.

Sectioned mushroom stained prominently red on the exposed stipe context. Stained context eventually turned black.

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Scott, this specimen…
By: Dave W (Dave W)
2015-07-29 17:53:15 PDT (-0700)

basically agreed with my concept of longicurvipes except for a couple things. Most notable was the bright red staining on the stipe context. Almost the entire inner stipe turned red, with just a few spotty areas remaining white. I’ve seen slight staining on the context of longicurvipes/viscidocorrugis in the past, but never such prominent/vivid staining as on this one. Also, the ornamentation on the stipe surface is coarser than is typical with longicurvipes.

So I’m still wondering if this may actually represent another species. Leccinum pseudoinsigne is reported as having context which stains cinnamon-red. But this uncommon species favors a birch/aspen habitat. The mushroom in this obs came from an oak/pine habitat, which is typical for longicurvipes. So it makes sense the mushroom seen here is just an atypically staining example of longicurvipes.

Thanks for weighing in.

I’ve found several similar examples in Allegheny county recently.
By: Scott Pavelle (Scott Pavelle)
2015-07-29 16:59:32 PDT (-0700)

Did you check the cap? It should have been viscid if you added some water, with a mildly corrugated textured.

BTW, it’s my understanding that longicurvipes and viscidocorrugis were combined due to DNA testing. The red-staining is considered an in-species variation.

Hi Noah.
By: Dave W (Dave W)
2015-07-28 07:35:19 PDT (-0700)

I had originally labeled this as longicurvipes. A lot of this species was brought in at the Eastern Penn Helen Miknis Foray. But this one seemed much more robust than any of the others. So I sectioned it to see if there may be a reason to suspect it being something else. The context in the stipe turned a vivid red that slowly darkened and faded to black. I seem to recall noting color changes in longicurvipes in the past. But the big bolete book says no color change for longicurvipes, and pink staining in the cap for viscidocorrugis. I thought the latter was a synonym for longicurvipes, but Index Fungorum includes it as a current species name. Anyway, the staining on the specimen seen here was really striking! I should have got a photo.

Created: 2015-07-27 22:41:01 PDT (-0700)
Last modified: 2015-07-29 16:57:33 PDT (-0700)
Viewed: 52 times, last viewed: 2017-06-20 09:40:53 PDT (-0700)
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