Observation 165375: Anaptychia palmulata (Michaux) Vainio
When: 2014-05-16
No herbarium specimen

Notes: Growing on rock, most likely limestone. The rock was very visible owing to all the growth on it. The lichen was in hard, crunchy mats that were above and around the rock they were on, almost as if they formed a bark covering of the rock.

I did collect a small sample. Not very big, but it is some!

I apologize for the photos. It was some very strong light.

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By: Tim Martin (T Martin2010)
2014-05-18 09:45:35 AEST (+1000)

I love side by side comparison photos. Yes, that is it, a vibrant spring green is what I got when I added a few drops of water. Definitely less gray. Nice!

I should’ve done this before
By: Jason Hollinger (jason)
2014-05-18 07:53:35 AEST (+1000)

Sounds like you’ve got it. Here is a pair of photos I took in the Smokies:

This is perfectly typical, not unusually vivid.

Just add water
By: Tim Martin (T Martin2010)
2014-05-18 06:20:15 AEST (+1000)

I took off a tiny chunk of my sample and added water. Originally it was a greenish gray maybe, as seen in the photos, but it turned a much brighter green. Not deep, just vivid. Definitely looked less washed out and yellowish when compared to the dry samples.

Well, you could do a K test on the cortex, too
By: Jason Hollinger (jason)
2014-05-17 16:10:22 AEST (+1000)

But it’s going to be hard to read if it turns bright green from the water! Put it this way, if it’s a Physcia or Heterodermia then it should stay pale gray but with yellow tint. If it’s Phaeophyscia or Anaptychia then it’ll turn darker or greener or browner but not obviously yellow. Assuming the latter, then check the underside: Anaptychia should be white or pale tan, Phaeophyscia black.

But Anaptychia palmulata happens to turn particularly vivid green when wet, I just thought that would be easier!

Just water?
By: Tim Martin (T Martin2010)
2014-05-17 15:42:39 AEST (+1000)

That is the only chemical test I need do?

I’m not sure
By: Jason Hollinger (jason)
2014-05-17 15:35:15 AEST (+1000)

Since you have a specimen, a good test would be to see if it turns bright green when wet. If I’m right about Anaptychia palmulata it should, and it should be K- and have a pale but corticate lower surface.

Created: 2014-05-17 12:59:29 AEST (+1000)
Last modified: 2014-05-18 07:54:07 AEST (+1000)
Viewed: 28 times, last viewed: 2016-10-23 17:55:17 AEST (+1000)
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