Observation 279378: Xylaria Hill ex Schrank

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70% (4)
Recognized by sight
29% (2)
Recognized by sight: Medium size, clavate, longer stem, cracked surface
Used references: Mushroom Expert: http://www.mushroomexpert.com/xylaria_longipes.html

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= Observer’s choice
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By: Danny Newman (myxomop)
2017-06-21 13:52:23 ADT (-0300)

is an overapplied name for any stocky, northern temperate Xylaria, much as X. hypoxylon is used for any slender, branching species with a white conidial stage. Closer scrutiny (ie: microscopy of the germ slit, spore size and apical apparati) often reveals identities outside of these two names. field guides are primarily to blame, as the breadth of their coverage tends to come at the expense of depth when it comes to any one group, but particularly ascomycetes (and particularly particularly xylariaceous fungi).

a cross section of the mature fruiting body and a look at the microscopic features mentioned above would be the next steps in assigning a species name to this material.

There are similar looking species
By: Django Grootmyers (heelsplitter)
2017-06-21 13:48:41 ADT (-0300)

that are differentiated using microscopic characteristics. This looks more like Xylaria cubensis to me but I wouldn’t be confident in that guess withoutseeing the anamorphic stage (Xylocoremium flabelliforme) or microscopy. The mushroomexpert page for Xylaria polymorpha has a pretty good summary and links to relevant literature.

Reply
By: Alden Dirks (aldendirks)
2017-06-21 12:48:01 ADT (-0300)

Hi Derek,

I would have guessed it is X. polymorpha, but most things seem to be X. polymorpha, so I was curious to see if somebody thought it might be something different. I’m curious whether X. polymorpha is actually one species or is a species complex that needs molecular work to disentangle and thought somebody might have input. The crackled tannish ascomata and “root” in the wood were new observations for me, though. From your experience, are those common features to X. polymorpha?

Hey Heelsplitter…
By: Derek Ziomber (Space Time Matters)
2017-06-21 12:16:18 ADT (-0300)

I’m just curious as to why you didn’t go straight for suggesting Xylaria polymorpha. This observation definitely seems to fit for an older specimen of X. polymorpha. Is it that there are similar species or a preferred synonym that I don’t know about (which has become a common occurrence since I joined Mushroom Observer)?

Created: 2017-06-21 01:33:34 ADT (-0300)
Last modified: 2017-06-28 15:24:21 ADT (-0300)
Viewed: 62 times, last viewed: 2019-09-13 13:49:23 ADT (-0300)
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