When: 2017-12-14

Collection location: Tannehill State Park, Tuscaloosa Co., Alabama, USA [Click for map]

Who: Vitaly Charny (vcharny)

No specimen available

ID by Jason Hollinger


Proposed Names

-16% (2)
Based on microscopic features: epihymenium olive, K+ greener; hymenium ~inspersed; hypothecium brown, K+ bright orange; spores ~12×6um
Based on chemical features: K~y C- KC- UV- KUV+y
-85% (1)
Based on chemical features: TLC — chemistry is… wrong, whatever it is!… xanthones are very hard to interpret

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= Observer’s choice
= Current consensus


Add Comment
I’m having a hard time identifying the substance these specimens have
By: Jason Hollinger (jason)
2018-07-12 19:14:26 CDT (-0500)

But I TLCed them all, and they are all consistent. They all have atranorin and a strong spot that runs runs fairly high (Rf probably in the 50s) in both solvents B’ and C. The spot is UV- before charring, and turns strong yellow-orange after charring and fluoresces greenish. It’s probably not a xanthone. I would guess that it’s something like 2’-O-methylperlatolic acid. (Most of the others in that group – the ones that char yellow to orange and fluoresce green – are UV+ bluish or whitish. And there is precedent: there are a couple other species in North America with 2’-O-methylperlatolic acid, like L. nashii.) I’ll try to verify this later if I do any more TLC this summer.

I feel confident of the genus, by the way, because it has the right ascus type, apothecial anatomy, and spore size etc. are in the right range.