Observation 53056: Amandinea punctata (Hoffm.) Coppins & Scheid.

When: 2010-09-15

Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]

45.789716° -77.132757°

Who: Paul Derbyshire (Twizzler)

No specimen available

A very interesting lichen. It was growing on a mature aspen trunk — on the north side only, from the look of it — and the fringes of the individual lichens blend in with the tree’s bark without a sharp delineation. There are black disklike raised apothecia 1-2mm wide, often in little clumps, while the thallus is a very pale green (how it photosynthesizes while reflecting away nearly all the incident light I have no idea!) and resembles cracked ceramic.

There were several instances on the tree of varying size, accompanied sometimes by a green moss that seems to colonize the bases of all mature and elderly aspens in this area.



Proposed Names

31% (2)
Recognized by sight
34% (4)
Eye3 Eyes3
Used references: Suggested by zaca and corroborated by a website link.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
how embarrassing…
By: Jason Hollinger (jason)
2010-09-28 08:53:50 CST (+0800)

The bug was in my fix of an old bug in RedCloth which probably doesn’t even exist any more! The link is now fixed.

I’m in the market for a good cheap microscope, too. (I already have a bad cheap microscope, and I’m done with that s—t! :)

Show me a free $500 microbiology microscope and I’ll show you a spore. :)
By: Paul Derbyshire (Twizzler)
2010-09-28 08:41:58 CST (+0800)
Ack! underscores
By: Jason Hollinger (jason)
2010-09-28 08:27:05 CST (+0800)

I need to verify it with a few test cases, but looks like zaca found a bug in the RedCloth implementation we’re using. Definitely shouldn’t be interpreting embedded underscores in any case I can think of.

I’m unwilling to guess the ID of a plain old black-dot lichen without being familiar with the crustose flora of your area, Paul. Amandinea punctata is certainly widespread, common, and plausible. But alternatives abound — some of which could well be locally common.

(Show me a spore, however — should be brown and two-celled — and I’d be delighted to give A. punctata a vote!)

By: Paul Derbyshire (Twizzler)
2010-09-17 07:13:32 CST (+0800)

the hell is it interpreting underscores INSIDE A URL THAT ISN’T EVEN DISPLAYED AS TEXT?

And where the hell is Jason? Now there’s TWO things here that are likely to be of interest to him. :)

By: Chris Parrish (kitparrish)
2010-09-17 07:05:14 CST (+0800)

Interesting. I tried to protect the underscores from interpretation with an escape character: write \_ instead of _, but that didn’t work at all.

link brokes down
By: zaca
2010-09-17 06:57:20 CST (+0800)

because the website address has some underscore symbols, which I think are interpreted at MO like italics.

By: Chris Parrish (kitparrish)
2010-09-17 06:50:35 CST (+0800)

I tried to add a conventional link to that page to an MO comment, but my link broke as well. Strange … but a fine lichen, and some wonderful microscopy at that site.

If you view that page in Google Chrome, you get a banner at the top of the page saying “This page is in French. Would you like to translate it?” … so I clicked “Translate” and it did a fine job. Amazing.

By: zaca
2010-09-17 05:05:15 CST (+0800)

I don’t know how to correct the link. Please go to the site
choose on the left menu Fiches-Photos and then select the name of the species.

By: Paul Derbyshire (Twizzler)
2010-09-17 04:46:20 CST (+0800)

Maybe. But “here” = a 404 page.


By: zaca
2010-09-17 01:41:57 CST (+0800)

It looks like Amandinea punctata. You can see some details on this species
here and also at MO 11729.

Created: 2010-09-16 14:55:48 CST (+0800)
Last modified: 2015-04-08 07:13:38 CST (+0800)
Viewed: 144 times, last viewed: 2017-06-08 13:03:23 CST (+0800)
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