Observation 204621: Aspicilia cinerea (L.) Körber

When: 2015-05-13

Collection location: Petenwell Rock, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

Specimen available


Copyright © 2015 Jason Hollinger (jason)
Copyright © 2015 Jason Hollinger (jason)

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Eye3 = Observer’s choice
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That will probably have to wait until we see a verified specimen!
By: Jason Hollinger (jason)
2016-01-10 07:15:50 ACDT (+1030)
OK, I guess we established now that A.cinerea in Wisconsin
By: Andrew Khitsun (Andrew)
2016-01-10 07:13:09 ACDT (+1030)

tends to come with very strong hypothallus. Confusing novices like me of course. I guess my other observations with very strong hypothallus are probably also cinerea, not limitata. The latter is supposed to have very limited (hence the name?) presence scattered all over the place, while the former is omnipresent. I wonder if there is any other strong(ish) morphological character I should be looking for trying to locate A.limitata

Yes, that’s the one, definitely looking at the correct specimen
By: Jason Hollinger (jason)
2016-01-10 06:59:53 ACDT (+1030)

In Thomson’s American Arctic Lichens vol II (AAL2) he says in description for A. cinerea “black prothallus often present and ringing thallus”. The Swedish flora doesn’t mention a prothallus or hypothallus one way or another. The Russian flora (after much work with google translator! :) says only “hypothallus blackish”. Bruce Ryan seems to say it’s variable (he describes several variants, many of which probably have new names now in the Sonoran Flora). The British Flora says “prothallus black, delimiting”.

Does that help?? ;)

Those two species confuse me,
By: Andrew Khitsun (Andrew)
2016-01-10 06:33:32 ACDT (+1030)

According to Thomson, A.cinerea is supposed to have “black hypothallus sometimes present between and edging the thallus” while in A.limitata it’s a “very prominent black hypothalloid margin”. Those remarks are just from one author, though, and are subjective anyways. But I was trying hard to chip away what I was photographing this time. Jason, please check if it’s a specimen #5132015-1 that you have

Added two close-up photos
By: Jason Hollinger (jason)
2016-01-10 05:04:31 ACDT (+1030)
Apparently A. cinerea can have a black prothallus, too
By: Jason Hollinger (jason)
2016-01-09 17:23:15 ACDT (+1030)

I saw a specimen, possibly from one of these photos, and it had abundant norstictic acid (K+ red), meaning at least some of this is A. cinerea, not A. limitata(?)

The dark leading edge is called prothallus,
By: Andrew Khitsun (Andrew)
2015-05-21 11:56:32 ACST (+0930)

and is a feature of some lichen species. The yellow lichen in the pictures is either Pleopsidium flavum or yellow Acarospora species.

What are
By: J-Dar
2015-05-21 11:34:58 ACST (+0930)

the other contiguous lichen species? Great photos, so interesting how they grow up against each other. Is the dark leading edge particular of this Aspicilia or is it something you see in other crusts?

Created: 2015-05-21 08:32:59 ACST (+0930)
Last modified: 2016-01-10 07:04:23 ACDT (+1030)
Viewed: 135 times, last viewed: 2017-06-20 17:52:45 ACST (+0930)
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