When: 2018-05-20

Collection location: Shaky Lake State Natural Area, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available

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Proposed Names

57% (1)
Based on microscopic features: Rhizines, not hapters

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= Observer’s choice
= Current consensus

Comments

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Ah, okay then
By: Jason Hollinger (jason)
2018-06-13 21:53:41 ADT (-0300)

Don’t worry, you will notice that it looks very different, even from a distance, long before you resort to checking for rhizines. Xanthoria polycarpa has narrow almost terete lobes, usually mounds up a bit. Xanthomendoza hasseana / X. montana have the look of this observation — a ±flat, spreading rosette, with lobe tips clearly foliose and flat.

There are only a few places I’ve been where the two grow nearby. In Turnbull NWR in eastern Washington, it was mostly hasseana/montana (forget which). But on sagrbrush right next to lakes you could find polycarpa. (I might have even gotten one specimen with the two growing side-by-side.) In short: polycarpa like sunny spots right next to water, hasseana likes forest mostly.

I’d recommend looking for polycarpa on open shrubs next to wetlands or the Lakes. If it’s really there (always in question because I doubt these species were all separated until a few decades ago), I’m sure you’ll find it!

Too much brandy when I was writing that ;-)
By: Andrew Khitsun (Andrew)
2018-06-13 21:37:35 ADT (-0300)

of course I meant poly not macro

Uh oh, here’s a stupid question…
By: Jason Hollinger (jason)
2018-06-13 13:42:09 ADT (-0300)

What is Xanthomendoza macrocarpa? Do you mean montana? Or polycarpa? No rhizines, you must mean Xanthoria polycarpa

I am going to annoy everyone with my X.hasseana
By: Andrew Khitsun (Andrew)
2018-05-23 20:52:45 ADT (-0300)

until I manage to find X.macrocarpa. In fact, after several years of looking I am beginning to suspect it doesn’t grow here, even though it’s supposed to be common according to Thomson. I examined hundreds of specimen, and it’s always X.hasseana – I always find fairly long rhizines on every specimen I pluck off the branches.

Created: 2018-05-23 20:46:53 ADT (-0300)
Last modified: 2018-06-13 21:53:43 ADT (-0300)
Viewed: 31 times, last viewed: 2018-12-26 14:27:30 AST (-0400)
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