Observation 276984: Lecanora Ach.

It is on diabasic and granitic blocks along edges of pine-tree forest.


Lecanora Ach._GPS_257W.jpg
Lecanora Ach._GPS_257W_.jpg
Lecanora Ach._GPS_257W_1.jpg
Lecanora Ach._GPS_257W_2.jpg

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L. gangaleoides has pure black apothecia
By: Jason Hollinger (jason)
2018-05-09 12:00:36 EDT (-0400)

At least, it does in North America! Also, in N. A. it is restricted to the coast with only a few rare reports from the Sierra Nevada. I suspect there is some confusion between L. argentea and L. gangaleoides. I don’t think those two taxa are fully understood yet. But in any case, both have distinctively black apothecia which sort of bleed up onto the inside of the rims a bit. It’s also worth noting that particularly dark-fruited forms of L. cenisia can merge into this group almost indistinguishably, if the epihymenium pigment is so dark that it obscures the POL+ crystals there, and if one fails to find any large blocky crystals in the amphithecium. (This is a common problem in my material; I will often have to section several apothecia before I will see any blocky crystals.)

Created: 2017-05-20 09:57:32 EDT (-0400)
Last modified: 2018-05-09 12:00:37 EDT (-0400)
Viewed: 32 times, last viewed: 2018-08-26 02:31:06 EDT (-0400)
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