Observation 91566: Lichen P. Micheli

When: 2011-09-04

Collection location: Dells of the Wisconsin River State Natural Area, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available


Proposed Names

86% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
Will try to find more.
By: Andrew Khitsun (Andrew)
2012-04-03 18:34:52 CDT (-0400)

This one was in the very public place, so even getting a slice to test is out of question. But I’ll be looking in that general area along the river to see if I can find more of these and take a sample.

You can often tell without microscopy
By: Jason Hollinger (jason)
2012-04-03 01:51:53 CDT (-0400)

Tephromela is distinguished from Lecanora by the hymenium being red/purple-colored. If you do a fairly clean section of an apothecium, you can see it easily, even with just a hand lens. Compared to any other Lecanora that are just sort of pale and dingy-looking inside, this one looks inky-black all the way through.

But, of course, there are Lecanora with black apothecia, too. Rinodina tends to have drab-looking thalli and smaller apothecia. They also have dark-colored spores, so they’re obvious under the microscope. Again, hand lens can be sufficient: the dark spores give a “peppered” look to the interior of the apothecium through a hand lens. Just be careful to do a “clean” cut, otherwise you can drag bits of the dark epihymenium through and get the same sort of look.

Only few locations in the state.
By: Andrew Khitsun (Andrew)
2012-04-03 00:38:55 CDT (-0400)

For some reason, it’s not encountered too often around here, found only at few location in the state. But one of the locations mentioned in Thomson “Lichen of WI” is barely 20 miles from where I took this photo. We might have a winner.

I’m thinking Tephromela atra
By: Jason Hollinger (jason)
2012-04-03 00:04:02 CDT (-0400)
By: Andrew Khitsun (Andrew)
2012-04-02 21:54:17 CDT (-0400)