Observation 219581: Rosellinia De Not.

Proposed Names

47% (2)
Used references: Beug et al. Ascomycete Fungi of North America
57% (1)
Used references: i think the subiculum is supposed to be underneath the stromata

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Didn’t see true subiculum, don’t have means to see spores :(
By: Andrew Khitsun (Andrew)
2015-10-18 20:13:08 -05 (-0500)

As always, can send you the specimen :)

By: Roo Vandegrift (Werdnus)
2015-10-18 15:09:16 -05 (-0500)

The conidial disks around the ostioles are really cool, but not diagnostic: many genera of Xylariaceae do that at times, including Rosellinia, Hypoxylon, Stilbohypoxylon and others.

It’s hard to see any evidence of a true subiculum from these photos, even where the material is obviously young: is the pale wood just wood, or is there an appressed covering of hyphae over the wood, underlying the stromata?

It also sort looks like you can see developing stromata poking through the pale parts of the woody substrate, indicating that they develop immersed in the wood (third picture, to the left). Additionally, some of these might be multi-peritheciate, which would rule out Rosellinia, but lots of Rosellinia grow close together and fuse at maturity.

If there’s no subiculum, and the stromata are sometimes multi-peritheciate, and they develop in the wood, that would make it a Stilbohypoxylon. That said, it does look an awful lot like R. subiculata: if you’ve got a specimen, look for that subiculum, and maybe try get a slide of the spores.

thoughts Werdnus?
By: Danny Newman (myxomop)
2015-10-18 13:10:00 -05 (-0500)

Created: 2015-10-17 21:50:21 -05 (-0500)
Last modified: 2015-10-18 13:09:48 -05 (-0500)
Viewed: 39 times, last viewed: 2017-06-21 00:02:38 -05 (-0500)
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