Observation 88420: Sticta dufourii Delise

When: 2012-02-21

Collection location: Sintra, Portugal [Click for map]

Who: zaca

No specimen available

I went back to the place where “all this began” (see MO47168) and took some pictures. The specimens seem to be healthy by now.

Proposed Names

29% (1)
Recognized by sight
62% (3)
Eye3 Eyes3
Used references: see photos in Stridvall’s gallery

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Jason Hollinger (jason)
2012-03-02 02:34:46 CST (-0500)

Beautiful specimen. It still looks like S. dufourii, as you suggested in the other observation. For whatever this is worth, it keys out unambiguously in the British Flora, but I’d be surprised if they weren’t missing a few of your species.

The burning question, then, seems to be what name do we apply for this material. The complication is that the fungal part of this lichen is identical to the fungal part of Sticta canariensis. The former uses the cyanobacterium Nostoc, the latter uses the green alga Chlorella (I think).

We could stick with a strict mycologist stance, and make no distinction, calling both S. canariensis. Or we could do the best we can with an imperfect mycocentric taxonomy, and preserve the old name S. dufourii Delise for the cyanobacterial morph. I recommend the latter. Even if it is controversial, it has the advantage of not destroying information. It allows us to search for the cyanomorph easily, for example. Calling them both the same thing “destroys information”, making it impossible for us to distinguish observations of the two without examining images one at a time.

Created: 2012-03-01 19:21:49 CST (-0500)
Last modified: 2012-03-02 13:54:57 CST (-0500)
Viewed: 74 times, last viewed: 2017-06-10 10:52:14 CDT (-0400)
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