Observation 95691: Parmotrema robustum group
When: 2012-04-25
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen
0 Sequences

Proposed Names

-11% (2)
Based on chemical features
84% (1)
Recognized by sight

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Chemistry is odd, I agree
By: Jason Hollinger (jason)
2012-05-29 12:59:53 MST (-0700)

But it doesn’t work any better for salazinic acid, which is a much redder red, if you know what I mean. It has such a strong and consistent reaction that it overwhelms anything else that might be present. If there’s any question, then it can’t be salazinic acid!

If only you had access to TLC… ;)

I n this case I hesitated a lot …
By: zaca
2012-05-29 12:51:42 MST (-0700)

and at the end I chose one compatible with the chemistry. The members of P. robustum group that I have found so far don’t have these chemical reactions.

Surface not finely cracked
By: Jason Hollinger (jason)
2012-05-29 11:58:42 MST (-0700)

The K test is unusual, I admit, but it’s definitely not right for salazinic acid (P. reticulatum). The C- KC+… pink? purplish? is most consistent with the P. robustum group, I think (including P. dilatatum and P. gardneri). And that’s exactly what it looks like to me, as well, with those beautiful, broad, perfectly-rounded, spreading lobe tips.

Created: 2012-05-28 13:09:43 MST (-0700)
Last modified: 2012-05-29 11:59:21 MST (-0700)
Viewed: 37 times, last viewed: 2017-10-29 09:33:39 MST (-0700)
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