Observation 77853: Nephroma laevigatum Ach.
When: 2011-09-25
Who: zaca
No herbarium specimen

Proposed Names

76% (2)
Eye3 Eyes3
Recognized by sight
-28% (1)
Recognized by sight: abundant lobules, smooth (but somewhat tomentose) lower surface, no soredia or isidia, white medulla

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
To identify a lichen by means
By: zaca
2011-10-04 15:41:12 CDT (-0500)

of photography is a thankless job that Jason plays masterfully.

Many many times it is very difficult to say something relevant about a lichen even seeing it, stirring it and analyzing it, let alone do it just looking at the photographs. It is therefore quite natural that sometimes misunderstandings arise because for just such that hues displayed by the photo are different from natural. It is therefore up to the observer to provide the greater number of data that he is able, because it will be easier. I think that is what happened in this case: I did not provided all the data, because I hadn’t them when the observation was created.

I’ve made the same mistake before, haven’t I?
By: Jason Hollinger (jason)
2011-10-04 02:26:51 CDT (-0500)

You are absolutely right, and the new photo shows the yellowish medulla much better. It’s just very difficult to capture that color in photos, maybe because the thallus is so dark, the medulla becomes overexposed and looks white no matter what. But there’s certainly no way to mistake that K+r test!

I have to disagree with you, Jason.
By: zaca
2011-10-03 15:46:24 CDT (-0500)

Because of the chemical reactions and of the data from microscopy. I uploaded already two photos with the new data. The results obtained for the dimensions of spores were the following: Me = 17.2 × 5.9 µm ; Qe = 2.9 (N=34).
Let me add that I don’t see white in the colour of medulla, maybe “dirty withish” or “dirty yellow” are preferable instead.

Most Nephroma can at least occasionally be lobulate
By: Jason Hollinger (jason)
2011-10-03 11:39:24 CDT (-0500)

But in N. laevigatum should be “at least partly yellow to orange, K+r” (from manuscript for Ways of Enlichenment).

Created: 2011-10-02 18:01:05 CDT (-0500)
Last modified: 2011-10-04 02:24:49 CDT (-0500)
Viewed: 40 times, last viewed: 2016-10-26 11:54:41 CDT (-0500)
Show Log