When: 2016-12-26

Collection location: West St. Louis Co., Missouri, USA [Click for map]

Who: Judi T. (AvidAmateur)

No specimen available

On the North side of a large living Pin Oak in suburban residential area, growing on the bark among other lichen species, moss, and some tiny Mycena corticola. Leafy thalli closely attached to the substrate (some appear corrugated and some are seen with soredia), brown underside. Some have minute blackish cilia on rim.


Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas

Proposed Names

3% (2)
Used references: http://www.fungi.myspecies.info/... ; http:/www.lichens.lastdragon.org/Flavoparmelia_caperata.html

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= Observer’s choice
= Current consensus


Add Comment
Thanks for the vote of confidence, Jason.
By: Judi T. (AvidAmateur)
2016-12-31 08:04:50 CST (+0800)

I’ll keep pluggin’ away:)

Sure, it takes some time to learn what to look for
By: Jason Hollinger (jason)
2016-12-31 06:32:10 CST (+0800)

But the good news is there aren’t that many things! You’ll have it in no time, I’m sure.

Aw, phooey! I was pretty confident
By: Judi T. (AvidAmateur)
2016-12-31 06:25:46 CST (+0800)

of my ID on this. It seemed to fit the descriptions I found online. Clearly, I need more experience in interpreting those descriptions; so it’s back to the drawing board for me. Need to focus more intently on the details of each structure. That’s hard for me to do when I can’t even recognize which structures belong to which species when I encounter mixed collections such as this one. Hopefully, I’ll be able to do that better after each experience as I can apply the tips you have provided. You know how appreciative I am for the guidance. THNX, Jason!

Note the attachment
By: Jason Hollinger (jason)
2016-12-30 07:54:13 CST (+0800)

Notice that this lichen is much more “ruffled” and loosely-attached than your average Flavoparmelia. Also, if you were to see them growing next to each other, you would see that Flavoparmelia is much greener. Also, pay attention to the “pom-poms” along the ruffly margins: this species has powdery ±round soralia along the margins or on short projections from the margins; F. caperata has coarser soralia originating on wart-like growths in the middle of the lobes. Lastly, also look for a very fine network of cracks in the skin of the upper surface. This is characteristic of Parmotrema reticulatum and kin. (This group of Parmotrema used to be called Rimelia. It’s still a “good” grouping, I think, but it is nested within Parmotrema so can no longer be treated as a separate genus.)

PS. The third photo is Punctelia rudecta I think. Notice the white speckles, closer attachment, and darker gun metal blue-gray color (from stronger presence of the pigment atranorin in the cortex).