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When: 2008-10-16

Collection location: near Cape Lookout, Tillamook Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

This very broadly lobed dark green lichen with a white edge also has white depressed dots on the surface, as well as upraised tiny black pines and tiny reddish-brown cup-shaped structures (spore producing?) on older section. Reminds me of Lobaria, but thicker texture than Lobaria I have previously seen. Could just be proximity to Pacific Ocean, I suppose. Reverse is mostly white with black bumps and both black and white rhizimes, growing on top of mosses.


Proposed Names

5% (2)
Recognized by sight
85% (1)
Recognized by sight: This is one of the green-algal forms of Peltigera. The black raised dots are cephalodia containing the usual cyanobacteria. The other common green-algal species are P. leucophlebia with crisped margins and P. britannica whose cephalodia are scales instead of lumps. P. aphthosa is a large species complex that hasn’t been fully worked out yet. (Every other time I talk to Trevor Goward it seems he’s changed his mind based on DNA evidence or new specimens.) So I’m happy to just leave it at P. aphthosa!

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= Observer’s choice
= Current consensus


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