Observation 165374: Verrucaria marmorea (Scop.) Arnold
When: 2014-05-16
No herbarium specimen

Notes: Found on some limestone (certain of the rock composition). Couldn’t collect any samples, not even sure how you do that when it grows on the rock itself. Growing in strong sunlight if that makes any difference, along a forested trail in calcareous, rocky, pretty moist woods.

Proposed Names

11% (2)
Recognized by sight
56% (1)
Used references: Harris & Ladd. 2005. Preliminary draft keys to lichens of the Ozarks.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I know!
By: Jason Hollinger (jason)
2014-06-17 10:16:25 PDT (-0700)

Verrucaria is poorly studied in North America.

By: Tim Martin (T Martin2010)
2014-06-17 10:01:35 PDT (-0700)

Thank you. I found very little information about this species online and what I did was mostly taxonomic. It seems such an interesting species.

That’s easy!
By: Jason Hollinger (jason)
2014-06-17 09:42:55 PDT (-0700)

Just change the votes. Someone still thinks it more likely that this is some other species of lichen than V. marmorea. I still thought it was equally likely to be something else. But I think we’ve progressed past that: I think this is a promising name (and that it’s doubtful it’s something else).

Soon as the consensus name is V. marmorea, it will show up on the name page.

How do you…
By: Tim Martin (T Martin2010)
2014-06-17 09:10:15 PDT (-0700)

…move this observation to Verrucaria marmorea page on Mushroom Observer? There are very few images of this on the site!

By: Tim Martin (T Martin2010)
2014-05-16 22:35:18 PDT (-0700)

Especially that top picture. I have never seen such pinkish lichen before. It was very striking. That whole rock it was on was striking, as it cactus, Purple-stem Cliffbrake, and a cedar tree growing from it. Could it BE any more limestone?

I tried to pry off a little section. I scratched the rock a tiny bit but no lichen came up. It was not going to happen! I stopped before I did any real damage.

Beautiful specimen!
By: Jason Hollinger (jason)
2014-05-16 22:32:40 PDT (-0700)

Still don’t know what it is! Just glanced through the Smokies key, and there are only two species where it mentions the perithecia being immersed inside calcareous rock like yours, Bagliettoa baldensis and B. calciseda. Photos on-line of neither species show the red coloration yours has. …Woah! Here it is maybe! Verrucaria marmorea. What do you think?? (Thanks to Harris & Ladd’s Ozark flora.)

Created: 2014-05-16 19:50:49 PDT (-0700)
Last modified: 2014-06-17 09:40:00 PDT (-0700)
Viewed: 32 times, last viewed: 2016-10-21 22:31:34 PDT (-0700)
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