Observation 199022: Buellia disciformis (Fr.) Mudd
When: 2015-02-14
Who: zaca
No herbarium specimen

Images

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507829
Microscopy: Apothecial section and hymenium;
507830
Microscopy: Asci and spores.
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Comparison of specimens: Hymenium clear vs inspersed.

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Comments

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That really helps, thanks!
By: J-Dar
2016-04-29 11:53:44 CDT (-0400)

I’ve only looked at specimens without inspersed oil drops, so seeing what they actually look like is great.

Example: Hymenium clear vs inspersed
By: zaca
2016-04-28 07:51:07 CDT (-0400)

I uploaded a photo with a comparison of two specimens, one with hymenium clear (just one that I’m analyzing now and serves as one with perfect transparent hymenium) and the one in this observation that serves an (extreme, say) example of one with hymenium inspersed. Of course, rarely you find such extreme cases and there are all intermediates between the two cases. If you have further doubts, please ask me. This character of the hymenium (clear vs inspersed) is not only used in Buellia but also in other genera of lichens. The case I know better in of the genus Graphis, where it is a very important character with taxonomical value.

Inspersed with oil drops
By: J-Dar
2016-04-27 23:58:22 CDT (-0400)

Do you have photos of this? I don’t have any context for what this looks like in the hymenium.

Microscopy added.
By: zaca
2015-02-19 05:59:28 CST (-0500)

Created: 2015-02-17 07:07:52 CST (-0500)
Last modified: 2016-04-28 07:49:54 CDT (-0400)
Viewed: 79 times, last viewed: 2017-06-19 22:28:42 CDT (-0400)
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