Observation 189224: Aspicilia A.Massal.

When: 2014-11-22

Collection location: near Canyon Creek trailhead, Washington, USA [Click for map]

Who: Richard Droker (wanderflechten)

No specimen available

on large (3m) Si rock beside creek

without permit only allowed collect a few apothecia (mushrooms)

doesn’t key for me – guess Aspicilia

Proposed Names

47% (2)
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; McCune, Bruce (2007) Miscellaneous Keys to Microlichens of the Pacific Northwest of North America
Based on microscopic features: thallus K neg
epi greener with HNO3
hym ≈140 µm I+blue
excip I+relatively dark blue
8 spores/asc ave 20×12µm
paraph anast ≈ 1µm, 3 at apices, submoniliform
Based on chemical features: thallus K neg
hym ≈140 µm I+blue
excip I+relatively dark blue

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I agree with Aspicilia
By: Jason Hollinger (jason)
2014-11-27 18:03:30 EST (-0500)

But without pycnidia, you probably won’t be able to get a confident name. A. Nordin and K. Knudsen both have told me essentially not to bother keeping specimens without both spores and conidia.

Nevertheless… this looks a lot like A. aquatica. Habitat is right. That smooth continuous to almost rimose white thallus is right (maybe too white and continuous!). Chemistry is right. Spores are right. Submoniliform is right (I think!) Very promising at least… If only you had conidia, too. :(

Created: 2014-11-22 12:16:14 EST (-0500)
Last modified: 2014-11-22 15:16:08 EST (-0500)
Viewed: 27 times, last viewed: 2017-06-19 09:54:37 EDT (-0400)
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