When: 2013-07-29

Collection location: Door Bluff Headlands County Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available

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Thallus was UV+ yellow in patches
By: Jason Hollinger (jason)
2014-05-24 12:57:45 WIB (+0700)

and both cortex and medulla of apothecia was C+r (best seen in section under microscope). According to Brodo & Lendemer 2012, that makes it O. arborea instead of O. androgyna. Brodo also says that the soredia are coarser in O. arborea.

Jason Hollinger identified this as O.arborea
By: Andrew Khitsun (Andrew)
2014-05-24 11:07:38 WIB (+0700)
Never seen this fertile
By: Jason Hollinger (jason)
2014-02-15 03:01:32 WIB (+0700)

Good find!