Observation 96028: Lecanora straminea Ach.

When: 2012-06-01

Collection location: Lummi Island, Whatcom Co., Washington, USA [Click for map]

Who: Richard Droker (wanderflechten)

Specimen available

This lichen is quite abundant on coastal rock (particularly those frequented by birds) of the Salish Sea of Washington and British Columbia.

compare with photos http://nhm2.uio.no/...

Species Lists


note K reaction above disk
typical habitat
C test + orange
C test + orange

Proposed Names

83% (1)
Eye3 Eyes3
Used references: 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; Noble, W. J. (1982) The Lichen Flora of the Coastal Douglas-fir Dry Subzone of British Columbia. Ph.D. Thesis, University of British Columbia, Reprinted and nomenclaturally updated in 1996 by Bruce McCune with per mission of the author.
Based on microscopic features: see photos; spores average 10×6.5u with distinct epispore, hymenium 50u tall

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Just the cortex, I see
By: Jason Hollinger (jason)
2012-06-03 16:41:19 CDT (-0400)

The xanthones are generally tropical (I have no idea why!), interesting to see an arctic species with it.

By: Richard Droker (wanderflechten)
2012-06-03 16:27:30 CDT (-0400)

Discussion with Jason Hollinger led me to Oliver Gilbert’s (very good, in my opinion) book “Lichens”, which has a color plate (not so good, in my opinion) captioned, ""The rare arctic-maritime species Lecanora straminea growing on a bird cliff, Flannan Isles." This moved me to acquire some fresh C to confirm the specimen as C+orange, which it is (see newly posted photo).

Brodo (2001) – “There are many other [than L. muralis] lobed species of Lecanora, especially in the west. Some of them contain xanthones in the cortex and either react C+ orange or are fluorescent in long-wave ultraviolet light. One example is L. stamina, which often accompanies L. murals on bird rocks along the west coast.”

By: Jason Hollinger (jason)
2012-06-02 21:48:08 CDT (-0400)
Noble (1982)
By: Richard Droker (wanderflechten)
2012-06-02 21:12:02 CDT (-0400)

It is still listed as available from Bruce McCune –

Do you have an electronic copy of Noble’s thesis updated by McCune?
By: Jason Hollinger (jason)
2012-06-01 20:20:02 CDT (-0400)

I have a preliminary copy in Word format that Trevor reviewed, but not the final, and certainly not an updated copy!

Created: 2012-06-01 20:01:07 CDT (-0400)
Last modified: 2012-06-01 20:01:09 CDT (-0400)
Viewed: 114 times, last viewed: 2017-12-19 04:01:58 CST (-0500)
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