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Observation 11637: Lichen P. Micheli

When: 2008-09-27

Collection location: Southeast Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Lichen growing on my Quercus palustra, a gift from a local squirrel. This lichen is the one in the center of the photo: grayish-green with tiny erumpent cup-shaped fruiting structures (at least I think they’re fruiting structures). Lichen is a very thin crust over the bark of the tree, fruiting thingies are prhaps 1-2mm above the background; total width of the lichen is 1.5 inches.


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Add Comment
Need a microscope!
By: Jason Hollinger (jason)
2008-09-27 17:35:28 PDT (-0700)

Unless it is a particularly recognizable crustose lichen, you almost have to look at the spores to get anywhere. The lovely, thick, smooth rims on the apothecia are very enticing, suggesting maybe Ochrolechia.