|I’d Call It That||3.0||0.00||0|
sum(score * weight) /
(total weight + 1)
Narrowed down dramatically, no doubt, if you only consider those on the Portuguese checklist (for whatever that is worth – you push its boundaries daily!) P. arnoldii would be my first guess, just because it is a species I’m familiar with. It looks very similar to perlatum, but has alectoronic instead of stictic acid. It looks too small for the P. robustum group, but who knows?
that the K-reaction was weak, but what are the alternatives?
The spot tests seem more consistent with atranorin in cortex (bleeding into the medulla) and protocetraric or alectoronic acid in the medulla (K- C- KC+ rose quickly turning golden). If it were stictic acid such as P. perlatum has, the K test would be deeper, and it should tend to clear after applying C not become stronger.
(I agree with you that the white splotches do not indicate the hypotropum group. The overall shape of the thallus is totally wrong for that group. This is just an unusually well-developed specimen.)
Created: 2012-03-29 12:07:58 CDT (-0500)
Last modified: 2012-03-29 13:19:33 CDT (-0500)
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