Observation 80865: Ochrolechia A. Massal.
When: 2011-09-25
Who: zaca
No herbarium specimen

Notes: 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.

Images

177938
177939
177940
Chemical reactions: on thallus (top); on apothecia (bottom).
177941
Microscopy – I.
177942
Microscopy – II.

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Comments

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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…

Created: 2011-10-27 12:45:35 PDT (-0700)
Last modified: 2011-10-27 12:45:39 PDT (-0700)
Viewed: 14 times, last viewed: 2016-10-27 17:53:48 PDT (-0700)
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