Observation 165856: Pertusaria DC.

When: 2014-05-24

Collection location: River Park, Lebanon, Linn Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Lichen is crustose on Oregon White oak (Quercus garryana), with small raised bumps on surface. Not really pustules, but something similar. Help appreciated!


Patch on left has been scraped by fingernail, exposing dark brown underneath.

Proposed Names

18% (2)
Used references: Brodo, Lichens of North America
61% (2)
Recognized by sight

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
More and more
By: Daniel B. Wheeler (Tuberale)
2014-05-27 18:33:54 BST (+0100)

I understand the wisdom of your comments, Jason. I, too, am recognizing the importance of voucher collections with obs., and chemical testing.

These “sorediate” Pertusaria require chemistry
By: Jason Hollinger (jason)
2014-05-27 18:21:34 BST (+0100)

At least they do out east. Maybe the only option in your area is P. amara, I don’t remember. It seems unlikely, though, considering just how many there are elsewhere in the continent!

Created: 2014-05-25 06:43:13 BST (+0100)
Last modified: 2014-05-27 18:32:30 BST (+0100)
Viewed: 25 times, last viewed: 2019-07-13 17:24:02 BST (+0100)
Show Log