Observation 62927: Dermatocarpon Eschw.
When: 2011-01-18
No herbarium specimen

Proposed Names

28% (1)
Eye3
Recognized by sight
56% (1)
Eyes3
Recognized by sight: foliose lichen, attached at a single point underneath, whitish with numerous tiny black perithecia barely visible, tattered appearance is also typical

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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A lot to remember
By: Jason Hollinger (jason)
2011-01-31 19:38:49 CET (+0100)

I know, believe me! I always forget something important, too. But start thinking of these things early and you will learn much faster than I. :)

By the way, it is much easier to remove specimens like this from rocks when they are wet. I found a tiny plastic spray bottle, filled it with water, and carry that with me whenever lichen-hunting. Just needs to be damp. Spray it a few times, wait several seconds… then be very patient. A “palette knife” is apparently ideal, but regular pocket knife works in a pinch.

Thanks Jason…
By: Alok Mahendroo (alok)
2011-01-31 16:13:15 CET (+0100)

Will make it a point to try and remember all this next time I go around the place… It was attached to the side of the rock but could not pry it enough to see the root properly, always found it under the conifer tree cover.. and no it could never be totally submerged (only under snow), mostly under the cover of conifers and on sedimentary rocks (I am not sure which), also could not pry the root which broke off embedded in the rock.. :((

By: Jason Hollinger (jason)
2011-01-30 19:47:04 CET (+0100)

I find this to be an extremely difficult genus, even with proper literature and a specimen in hand. Underside is important, but unlike the similar (but unrelated) genus Umbilicaria, you need other subtle characters, like how the medulla reacts in I, conidia and/or spore characteristics. If you’re lucky, it has root-like structures underneath, and you can narrow it down to a few (e.g. D. moulinsii). It also helps a great deal if you take good notes about its location: how exposed it is, how often it is wet, if it ever is submerged completely for periods of time, if it is in an area of the rock which funnels run-off, if it’s on limestone, dolomite, granite, etc. It does help in this case that yours is clearly a single lobe (not “polyphyllous”). It might even be reasonable to guess that yours is in the D. miniata group.

Created: 2011-01-30 18:25:32 CET (+0100)
Last modified: 2011-01-30 19:39:22 CET (+0100)
Viewed: 49 times, last viewed: 2016-03-29 22:46:18 CEST (+0200)
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