Observation 69280: Ochrolechia A. Massal.

When: 2011-06-13

Collection location: Matinha de Queluz, Sintra, Portugal [Click for map]

Who: zaca

No specimen available

Growing on bark.
Microscopic preparations: KOH with a drop of congo-red.


Chemical reactions.
Apothecial section.
Apothecial sections: details.
Apothecial section, spores in ascus and isolated spores.

Proposed Names

58% (1)
Based on microscopic features: See attached photos.
Based on chemical features: See attached photos.

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= Observer’s choice
= Current consensus


Add Comment
Thanks, Jason.
By: zaca
2011-06-15 11:53:28 CDT (-0400)

I will keep your advice in mind.

An important thing to check for this genus
By: Jason Hollinger (jason)
2011-06-15 11:20:08 CDT (-0400)

Check the spot test of the cortex, disk and medulla of the apothecia separately — very difficult to do, requiring careful application with needle or toothpick under 30x or more magnification (at least for me!) For example:

O. africana has C+r medulla but C- cortex
O. trochophora has C- medulla but C+r cortex