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Summary

Description

Porpidia flavocaerulescens (Hornem.) Hertel & A.J. Schwab

Image location: Camp Ridge, Denali National Park and Preserve, Alaska, USA

Posting this because the more I look at several common orange crusts (Lecidea lapicida and others, Porpidea flavocaerulescens and others, Rhizocarpon oederi, and Tremolechia atrata – I’ll post some examples of these) the more they confuse me. Wasn’t even convinced this was a Porpidia until ink mount (see photo) revealed perispore, as some other features could have led to a different interpretation.

Going over references again I’m wondering if this might be P. flavocruenta (apo sectons bled reddish in K). I’ll go ahead and post this and get back after some more consideration (or suggestions from Jason).

Used references: Brodo, Irwin M., Sharnoff, Sylvia Duran and Sharnoff, Stephen (2001) Lichens of North America; Thomson, J.W. (1997) American Arctic Lichens (which seems confusing, perhaps some changes since 1997), 2. The Microlichens; Smith, C.W., Aptroot, A., Coppins, B.J., Fletcher, A., Gilbert, O.L., James, P.W. and Wolseley, P.A. (2009) The Lichens of Great Britain and Ireland

Based on microscopic features: hymenium approx 100u; paraphyses approx 1.5u diameter with apex aprox 3u and pigmented, found it very difficult to determine degree of branching (very conglutinate) – took a while to find some branching and anastomosing; spores 8/ascus average 18×9u

Based on chemical features: medulla iodine negetive, apo section bled reddish

For more information about this, see the observation page at Mushroom Observer.

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This image is Image Number 259698 at Mushroom Observer, a source for mycological images.

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Author
This image was created by user Richard Droker (wanderflechten) at Mushroom Observer, a source for mycological images.
You can contact this user here.

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This image is Image Number 259698 at Mushroom Observer, a source for mycological images.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.


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, was reviewed on 24 April 2018 by reviewer Christian Ferrer, who confirmed that it was available there under the stated license on that date.

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6 September 2012

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Date/TimeThumbnailDimensionsUserComment
current05:33, 24 April 2018Thumbnail for version as of 05:33, 24 April 20181,605 × 1,080 (334 KB)Leoboudv=={{int:filedesc}}== {{Information |Description='''''Porpidia flavocaerulescens''''' (Hornem.) Hertel & A.J. Schwab Image location: Camp Ridge, Denali National Park and Preserve, Alaska, USA Posting this because the more I look at several common orange crusts (Lecidea lapicida and others, Porpidea flavocaerulescens and others, Rhizocarpon oederi, and Tremolechia atrata – I’ll post some examples of these) the more they confuse me. Wasn’t even convinced this was a Porpidia u...

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