Observation 54107: Cladonia caespiticia (Pers.) Flörke

When: 2010-08-28

Collection location: Sintra, Portugal [Click for map]

Who: zaca

No specimen available

The thallus of this specimen clearly points to a Cladonia species. Hovewer, no apothecia is present. Looking in the net for information about sterile species of cladonia I found references to three species: C. apodocarpa, C. caespiticia and C. petrophila. For the later I was not able to find any image. For the other species I found images in Sharnoff Photos and observations in the MO database, MO45175 for C. apodocarpa and MO21295 for C. caespiticia. The squamules of C. apodocarpa are of a different form than those of my specimen, but the squamules of C. caespiticia from the above cited observation are very much like those of my specimen. In Sharnoff Photos a photo of a specimen with podetia can be seen. Thus I think that C. caespiticia is a possiblity for the classification of this one.


2010-10-02 photo added
2010-10-02 photo added
2010-10-02 photo added: C reaction on the left; K reaction on the right
2010-10-02 photo added: C reaction on the left; KC reaction on the right

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Add Comment
Thanks, Chris, for the clarification about spot tests in Cladonia.
By: zaca
2010-10-03 05:56:01 CDT (-0400)

I have tried to clarify this matter for this specimen because, on the one hand, it is obviously a healthy and thriving one and, on the other hand, the others of this genus I have found with this size or less had already associated fruiting bodies. But it seems that I can not go much further.

K+ red
By: Chris Parrish (kitparrish)
2010-10-03 00:19:08 CDT (-0400)

Bruce Ryan’s notes on North American Cladonia indicate that there are a number of North American species of squamulous Cladonia with K+ red reactions.

Cladonia with podetia absent or very small and weakly developed” (Ryan, 1995, unpublished):

1a. P+ yellow or red, K+ red

andereggii, symphycarpa, polycarpoides

1b. P-, K+ deep red (anthraquinones)

robbinsii, incrassata, luteoalba,
sulphurina, bellidiflora, metacorallifera,
coccifera, pleurota, deformis

Your K+ purple reaction would seem to indicate that your squamulous Cladonia contains anthraquinones.

New data added.
By: zaca
2010-10-02 17:39:03 CDT (-0400)

Today I return to the place of the observation, take new photographs and performed the spots tests. The result of this tests seems to rule out C caespiticia. In fact, according to Landemer and Hodkinson the results of the spot tests for that species are: K+ dirty yellow, C-, KC-. In this paper there are two species having purple reactions, namely:
- C. petrophila, Chemotype I: K+ weak yellow, C-, KC+ weak purple;
- C. stipitata: K+ yellow, C-, KC+ weak purple;
but I don’t know if it can be either of them, because in my specimen the purple reaction already appears with K.

Created: 2010-09-30 07:03:00 CDT (-0400)
Last modified: 2010-10-02 17:47:12 CDT (-0400)
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