Observation 73232: Cladonia apodocarpa Robbins
When: 2011-07-16
Who: zaca
No herbarium specimen

Notes: When I first saw it I thought that was a Peltigera, but I saw no rhizines on the underside of lobes; When I saw the photograph I seemed to see something like a pseudocyphellae on the underside, which could indicate Sticta, but when I observed the underside under the micro I saw nothing, pure silky; Finally, I tryed Nephroma, but I couldn’t found nothing similar. What could be then?

Images

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The piece on the left was wet.
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Top: Comparison with the Peltigera in MO73061 (this one on the left); Bottom: chemical reactions.

Proposed Names

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Comments

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Cladonia can do weird things
By: Jason Hollinger (jason)
2011-08-06 17:28:21 UTC (+0000)

I’m glad you found the Lendemer & Hodkinson paper, but note that it doesn’t even work in western North America (despite their implicit claim to the contrary), let alone Europe. Be prepared for frustration in this group. The only thing you’re likely to be able to clear up with further observation is whether or not there’s any yellow stage in the K test (and even that is ambiguous at best). Wish I could be more positive!

But it is definitely always worth scouring such apparently apodetiate Cladonia very carefully just in case there is a small podetium or apothecium or pycnidium hidden in there somewhere. Even if only one out of six specimens turn out to have anything, that’s at least something: at least you have a few firm ids from which you can work.

Good explanation!
By: zaca
2011-08-06 10:39:32 UTC (+0000)

I never thought that the squamules of Cladonia could be that big. I’ve seen already some images very similar to mine of Cladonia apodocarpa, in particular one in Lendemer and Hodkinson. The spot tests agree with the explanations given there. Thus I think that C. apodocarpa is probalbly the species of my specimen.

The next time I will find it (hoping very soon) I’ll perform the spot tests as you recommended and I’ll look for pycnidia as well. Thanks, Jason.

One of the apodetiate Cladonia
By: Jason Hollinger (jason)
2011-08-06 05:59:55 UTC (+0000)

The spot tests are consistent with fumarprotocetraric acid. This rules out a number, but leaves several, e.g., C. apodocarpa (which also contains atranorin, so it is generally noticeably K+ yellow especially at first, before the K+ red-brown develops from the fumarprotocetraric). One thing to look for, though by no means always present, are small black globose or barrel-shaped structures sitting on the squamules (pycnidia). Their presence verifies the group within Cladonia (and rules out more annoying possibilities such as that you simply have a remarkably well-developed sterile specimen of something that normally has podetia — those can be a nightmare to identify even with excellent literature, access to PPD, patience and everything going your way!) I find that the spot tests in this group are generally best on the underside of the squamules. In other groups of Cladonia it may be better to test the tips of podetia or the upper side of squamules, but in this it seems to show most clearly on the white underside.

Created: 2011-08-05 23:45:51 UTC (+0000)
Last modified: 2012-07-09 20:04:09 UTC (+0000)
Viewed: 56 times, last viewed: 2016-03-30 19:43:36 UTC (+0000)
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