Observation 80865: Ochrolechia A. Massal.

When: 2011-09-25

Collection location: Planalto das Cezaredas, Portugal [Click for map]

Who: zaca

No specimen available

Some peculiarities of this specimen:
(1) Growing on a fence in the field;
(2) The whitish thallus seems to invade the rim of apothecia given to it a floccose appearance;
(3) The discs of apothecia are red colored with granular texture and pruinose;
(4) Very big spores with the following average dimensions:
Me = 58.6 × 28.2 µm ; Qe = 2.1 (N=50);
(5) The only mature ascus with spores inside that I found (see the 2nd photo of microscopy) seems to have more than the usual 8 spores.

In spite of the help given by Jason with the key for saxicolous Ochrolechia (see MO79376) I could not elect a good candidate for classification.


Chemical reactions: on thallus (top); on apothecia (bottom).
Microscopy – I.
Microscopy – II.

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Add Comment
In fact,
By: zaca
2011-10-27 16:44:05 PDT (-0700)

the specimen exhibit some strange characteristics, like the one you mentioned in your message. So strange that I initially did not recognize it as an Ochrolechia. Thank you, Jason, for your comment.

Yet another weird one
By: Jason Hollinger (jason)
2011-10-27 12:52:58 PDT (-0700)

Usually, the larger the spores, the fewer per ascus. Remarkable to see polysporous asci with such large spores. Way outside my experience…