Observation 88016: Duplicate

When: 2012-02-19

Collection location: Spencer Island, Snohomish Co., Washington, USA [Click for map]

Who: Richard Droker (wanderflechten)

Specimen available

on bark of dead branch Alnus Rubra

this is an area of relatively low air quality (near interstate highway and agriculture)

Jason Hollinger suggested C. griffithii – thanks! Although the morphology really fit, initially this seemed problematic because the 1st section was polarization negative, the spores were somewhat large (17 × 4) and most were 2- and 3-septate. Later sections fit C. griffithii well. (see notes with images)

Never could see a K reaction.

Species Lists


image is 12mm across
7.5mm across (one of the larger apothecia)

Proposed Names

16% (2)
Used references: Nash III, T.H., Ryan, B.D., Diederich, P., Gries, C. and Bungartz, F. (eds) (2004) Lichen Flora of the Greater Sonoran Desert Region, Volume 2, 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: see photos; spores average ca. 13 × 4 1-septate
82% (1)
Recognized by sight: See observation 88015

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= Observer’s choice
= Current consensus


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