Observation 316439: Fungi Bartl.

When: 2018-05-13

Collection location: Bluff Creek State Natural Area, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available



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Sorry if I didn’t make it clear,
By: Andrew Khitsun (Andrew)
2018-05-16 20:10:51 PDT (-0700)

these are on the cut across the fallen (or felled) log

Thanks for the correction, Herbert. They sure looked like
By: Judi T. (AvidAmateur)
2018-05-16 19:33:16 PDT (-0700)

the stringy cords of rhizomorphs from my viewport. I’ll have to take another look at the pics.

Hi Judi
By: Erlon (Herbert Baker)
2018-05-16 17:56:43 PDT (-0700)

These are not rhizomorphs, they are demarcation lines highlighting the boundary between competing microorganisms, otherwise known as spalted wood.

The zones lines are mostly mycelium, also called a pseudosclerotial plate. The outer hard black crust of Inonotus obliquus f. sterilis (chaga) is also a pseudosclerotial plate.

Also see my Ob #273432
By: Judi T. (AvidAmateur)
2018-05-16 16:35:10 PDT (-0700)
The black “strings” look like the typical
By: Judi T. (AvidAmateur)
2018-05-16 16:25:27 PDT (-0700)

Armillaria rhizomorphs that I have seen most often under the sloughing bark of hardwoods, especially oak. See obs # 299584, 276563 and 301477 for some good examples.

By: Erlon (Herbert Baker)
2018-05-16 04:17:31 PDT (-0700)

Zone lines and white rot are more common in hardwood species. It could be a combination of different fungi working in concert or a single fungus.

Robinson, S. C., & Laks, P. E. (2010). Wood species and culture age affect zone line production of Xylaria polymorpha. Open Mycology Journal, 4, 18-21. https://benthamopen.com/contents/pdf/TOMYCJ/TOMYCJ-4-18.pdf

Anybody knows their Heart Rots and such?
By: Andrew Khitsun (Andrew)
2018-05-15 21:37:05 PDT (-0700)

Sorry but as often the case with these logs, I don’t know what tree it was when it was alive :-(

Created: 2018-05-15 21:34:47 PDT (-0700)
Last modified: 2018-05-16 20:10:52 PDT (-0700)
Viewed: 89 times, last viewed: 2018-05-28 07:54:29 PDT (-0700)
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