Observation 90242: Xanthomendoza fallax (Hepp ex Arnold) Søchting, Kärnefelt & S. Kondr.

When: 2012-03-18

Collection location: Picnic Point, Madison, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

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Eye3 = Observer’s choice
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Yes, of course, that’s what I meant (I always confuse those two names)
By: Andrew Khitsun (Andrew)
2012-03-18 16:49:44 PDT (-0700)

It’s on stonework in the park, in deep shade (hence the green color). I have the specimen and can check it. On the balance, this looks quite different than specimens on bark that are very common here. That must be due to a substrate?

Can this be X. fallax?
By: Jason Hollinger (jason)
2012-03-18 16:47:54 PDT (-0700)

According to Lindblom in Sonoran Flora Vol. II it does rare occur on rock. All of the soralia have that corticate flap surrounding them that fallax has, like the soredia is originating between the cortices, not underneath the lobes.

But if it is X. fulva s. lato, then just a gentle reminder that only X. weberi is known in Wisconsin. …Unless you know something and you’re holding out on us??

[EDIT: Of course, on further thought, there are things wrong with fallax, too: far too yellowish, no lobes, not even the marginal ones, are appressed, … Sigh. Maybe we need to consider X. ulophyllodes, too???]

What the…?
By: Andrew Khitsun (Andrew)
2012-03-18 16:46:09 PDT (-0700)

Looks like there are some “true” lobes here and there, but most of the surface is taken by X.fallax-like sorediate “cones”.

Created: 2012-03-18 16:36:10 PDT (-0700)
Last modified: 2012-03-18 16:50:38 PDT (-0700)
Viewed: 74 times, last viewed: 2017-06-10 09:51:19 PDT (-0700)
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