Observation 159408: Lepraria finkii (B. de Lesd.) R.C. Harris

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Eye3 = Observer’s choice
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Chemistry for this specimen
By: Jason Hollinger (jason)
2014-05-22 22:08:08 PDT (-0700)

K+ strong yellow, C-, KC~ (impossible to read), UV+/- white, P+ orange strong

I’m interpreting this as stictic acid. It’s hard to rule out L. vouauxii based on spot tests alone because the KC+ yellow for dibenzofurans is so hard to see due to the strong K+ yellow reaction. But I don’t see any hint of yellowish coloration in the photos from the field (and Andrew’s photos have remarkably reliable colors usually).

This is definitely the thickest specimen of Lepraria I’ve ever seen. And I’m not sure what to do with the weak UV+ white reaction.

Sorry, not much help, am I?
By: Jason Hollinger (jason)
2014-02-10 17:29:14 PST (-0800)

I just looked through all the species in Lepraria s. str., and there don’t seem to be many with such thick hypothallus, but maybe this isn’t even in Lepraria s. str.(!) so who knows… (Check out L. vouauxii, for example, in James’s monograph.)

I agree with your comments.
By: Andrew Khitsun (Andrew)
2014-02-10 16:50:01 PST (-0800)

I just have no idea what it is. While there are no “lips” on the lobes spreading outward, there are some on the lobes at the center of thallus – the whole structure with lobes at the center is different from “normal” Lepraria . As far as size goes, the biggest thallus was only couple of inches in diameter or just slightly more. OK, maybe three.

I’m not convinced
By: Jason Hollinger (jason)
2014-02-10 09:29:54 PST (-0800)

The key to L. normandinoides is the raised lip along the edge. This is nice and thick and separating from the substrate (well-developed hypothallus I think the term is), but I don’t see the distinct lip. (These thalli are also many times larger than I’ve ever seen L. normandinoides, but you regularly show me things way better developed than I’m used to seeing…)

Created: 2014-02-09 17:28:20 PST (-0800)
Last modified: 2014-05-22 21:29:27 PDT (-0700)
Viewed: 42 times, last viewed: 2015-12-28 15:52:25 PST (-0800)
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