Observation 165871: Hypotrachyna britannica (D. Hawksw. & P. James) Coppins
When: 2014-05-24
Collection location: Braga, Portugal [Click for map]
No herbarium specimen

Notes: On rock. Underside black, brown on lobe tips, black simple(?) and short rizines

Proposed Names

28% (1)
Recognized by sight
15% (2)
Recognized by sight
28% (1)
Recognized by sight: based on gestalt alone

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Haha!
By: Jason Hollinger (jason)
2014-05-27 13:28:04 CST (-0600)

I totally misinterpreted that website! Still, it could be something else entirely…

Hypotrachyna afrorevoluta
By: Elsa (pinknailsgirl)
2014-05-27 13:14:03 CST (-0600)

has shorter, wider lobes, lighter terminal soredia ):p

Certainly a possibility but…
By: Jason Hollinger (jason)
2014-05-27 12:04:32 CST (-0600)

I’ve not had a good track record with guessing Hypotrachyna species based on sight alone. (There are a dozen or more species in the Great Smoky Mountains in southeastern US where I’ve done a lot of work.) So I’m hesitant to say much more without chemistry. But I will anyway! :) The page you pointed to specifically mentions the difference between H. brittanica and H. afrorevoluta as lobe length and width: based on that (and the photo on that page for reference), I would say H. afrorevoluta would be more likely, since yours definitely has longer narrower lobes than what is shown for H. brittanica on that page.

My first guess
By: Elsa (pinknailsgirl)
2014-05-27 11:53:08 CST (-0600)

was Hypotrachyna too but as I was unsure I waited for a suggestion. Nevertheless I have to recognise that I could be shuffling the samples I brought. So, the best thing is to go there again and confirm.That’s why I didn’t vote yet.

In case of Hypotrachyna, maybe I would go to Hypotrachyna brittanica http://www.irishlichens.ie/pages-lichen/l-327.html what do you think?

This looks more like a Hypotrachyna to me
By: Jason Hollinger (jason)
2014-05-27 11:03:44 CST (-0600)

I’m not seeing and inflated lobes. And the coarse almost pustulose soredia, the rounded branch axils, the squared off lobe tips, the overall loose sprawling habit… they all paint a picture of something like Hypotrachyna afrorevoluta, say. The clincher would be if some of those rhizines were forked, of course. (Also, doesn’t the presence of rhizines rule out Hypogymnia? Or does it occasionally produce some?)

why not
By: Elsa (pinknailsgirl)
2014-05-25 14:37:48 CST (-0600)

H. physoides?

It seems to me
By: zaca
2014-05-25 14:05:53 CST (-0600)

like an Hypogymnia, though maybe not the common H. physoides. However, the other species I known also don´t fit.

Created: 2014-05-25 13:53:14 CST (-0600)
Last modified: 2014-07-05 15:37:55 CST (-0600)
Viewed: 39 times, last viewed: 2016-11-26 09:07:12 CST (-0600)
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