Observation 166009: Lichen P. Micheli
When: 2014-05-24
No herbarium specimen

Notes: On rock, probably limestone, in deep forest along a trail.

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With great difficulty
By: Jason Hollinger (jason)
2014-05-27 14:19:27 EDT (-0400)

There is a reason the epiphytic crusts are more well-studied than saxicolous! In an ideal world, you could cast around the general area for a while and find another specimen which is easier to collect, say, on a pebble or nearer to the edge of the rock. Failing that… break out the hammer and chisel and get to work. Even if you are committed and don’t mind utterly defacing the rock (a big “if”), these things can still be very difficult to get without reducing it to a pile of shards and dust. Honestly, if it’s not a super-interesting specimen, and if the rock is really hard, I would just walk away from something like this. :(

(Some rock is okay, though. Soft sandstone for example. With a little practice, you can work out how to chisel a little hole beside the specimen then chip it off with a good firm lateral blow. Rocks like narrowly-bedded slates that flake easily are also great. Sometimes I’ll go crazy collecting when I find a good friable rock that comes apart in nice neat thin plates! I mean, how can you pass up an opportunity like that?? :)

Thanks.
By: Tim Martin (T Martin2010)
2014-05-27 14:06:55 EDT (-0400)

How would you sample this one? It seemed flush with the surface of the rock.

Initial guess would be Aspicilia
By: Jason Hollinger (jason)
2014-05-27 13:51:41 EDT (-0400)

And there are blessedly few to choose from out east! Most species of Aspicilia have well-developed areoles right to the margin. This looks continuous and smooth near the margin, suggesting that it may be A. laevata. But you would probably want to do some microscopy to confirm. :(

Created: 2014-05-27 13:18:34 EDT (-0400)
Last modified: 2014-05-27 13:18:46 EDT (-0400)
Viewed: 9 times, last viewed: 2016-10-20 21:24:26 EDT (-0400)
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