Observation 87001: Lecanora valesiaca (Müll. Arg.) Stizenb.
When: 2011-10-02
No herbarium specimen

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Way to go!
By: Jason Hollinger (jason)
2012-01-27 01:17:47 CST (-0500)

Never heard of this thing either. It’s a beauty. Thanks for looking that up, Chris.

Thanks, Chris
By: Andrew Khitsun (Andrew)
2012-01-26 23:54:27 CST (-0500)

It looks like L.valesiaca to me. It turned out to be one of those species whose existence was not widely known to amateurs like myself, since it’s not frequently pictured. But since you mentioned it, I found the illustration in the third volume of Sonoran Lichen Flora, and identical one displayed online at Arizona Mycota Project here:
http://www.azfungi.org/...

lobate Lecanora in Wisconsin
By: Chris Parrish (kitparrish)
2012-01-26 23:14:12 CST (-0500)

I took a look at Thompson’s “Lichens of Wisconsin,” (2003, pp.115, 122, 126). In the key for Lecanora, if you choose

“Growing on rocks, thallus lobate toward periphery (and not with dispersed, loosely attached, lobate areoles),”

then you are left with two choices:

1a. Thallus epruinose or sometimes slightly pruinose on the lobe tips; containing usnic acid and zeorin; on HCl– or HCl+ rock … Lecanora muralis
1b. Thallus with dense white pruina; apothecia grayish yellow to yellow-brown; containing usnic and roccellic acid; on HCl+ rock … Lecanora valesiaca

Lecanora valesiaca is “known from rock outcrops in the Driftless area.” The range map for Lecanora valesiaca shows 6 localities in the SW part of the state, and the map for Lecanora muralis shows a number of localities there and scattered about in other areas of Wisconsin, so your locality would seem to be within the range of both. Bruce Ryan published a study of Lecanora valesiaca in 1990. I haven’t found any photos of it.

L. muralis only?
By: Andrew Khitsun (Andrew)
2012-01-26 21:35:28 CST (-0500)

We don’t seem to have other species with lobes among Lecanora, at least to my knowledge. L.garovaglii & L.novomexicana don’t grow here. I’ll need to manage to get a specimen at some point.

Looks a bit off
By: Jason Hollinger (jason)
2012-01-26 21:07:34 CST (-0500)

But I bet it’s in that group. The whole group confuses the heck out of me! What are our options for that area, anyway? I’d need to look at checklists, etc. but don’t have time right now.

Lecanora muralis?
By: Andrew Khitsun (Andrew)
2012-01-26 21:04:25 CST (-0500)

I wonder if it’s Lecanora muralis. It grows in full sun on sandstone.

Created: 2012-01-26 20:58:21 CST (-0500)
Last modified: 2012-01-27 20:49:06 CST (-0500)
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