Observation 58701: Lichen P. Micheli

When: 2010-11-13

Collection location: North Falmouth, Falmouth, Massachusetts, USA [Click for map]

Who: Nathan Wilson (nathan)

No specimen available


Tweaked the color to get rid of an inaccurate blue cast.

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hammer and chisel
By: Jason Hollinger (jason)
2010-11-14 11:43:50 CST (-0600)

Not pretty, but like you say, what are you gonna do?? Ideally I look around to try to find a specimen on the corner of a rock which would be easy to chip off. It can be really hard to get a good specimen from the center of a flat face of hard rock without making an ugly scar and shattering it mercilessly. But in desperate times, I’ve made do with prying off one or two apothecia with a pocket knife into a ziplock — but, wow, is it hard to section a bare apothecium that’s less than a millimeter wide!! Hah!

How do you make a reasonable collection?
By: Nathan Wilson (nathan)
2010-11-14 08:31:35 CST (-0600)

Given that the boulder it is on weighs several tons, do you scrape it of with an knife or do you try to get a chip of the rock? I assume the key is to get one of the apothecia.

need spores at least
By: Jason Hollinger (jason)
2010-11-13 23:03:06 CST (-0600)

Rhizocarpon concentricum looks like this, but so do several other totally unrelated lecideoid lichens, like some Lecidea and some Porpidia. If R. concentricum would expect muriform hyaline spores with something like 7 or 8 cells (I forget the exact number).

Created: 2010-11-13 17:33:49 CST (-0600)
Last modified: 2010-11-13 17:33:51 CST (-0600)
Viewed: 55 times, last viewed: 2017-06-08 04:56:46 CDT (-0500)
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