When: 2014-05-24

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

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Ribbon-like crustose lichen on Bigleaf maple (Acer macrophyllum).


Proposed Names

-1% (2)
Recognized by sight
56% (1)
Recognized by sight: need to check if medulla is faintly yellowish, could be P. enteroxantha (likely) or P. isidiigera / P. detersa (need to check cellular arrangement of the cortices to distinguish these, unless you happen to be out of the range of one or the other)
86% (1)
Used references: Brodo, Lichens of North America

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

= Observer’s choice
= Current consensus


Add Comment
This species
By: Daniel B. Wheeler (Tuberale)
2014-05-27 12:50:50 CDT (-0500)

would be so much easier to discuss with a voucher specimen(s) at hand.

By: Jason Hollinger (jason)
2014-05-27 12:36:46 CDT (-0500)

then that reduces it to P. enteroxantha or P. isidiigera. All of the above should have marginal “soredia”, but in practice, in stressed specimens the soralia will erode the thallus so much as to appear laminal.

Thanks for helping, zaca.
By: Daniel B. Wheeler (Tuberale)
2014-05-27 12:08:41 CDT (-0500)

I seriously considered your suggestion but could find none native to my area (Oregon). Nearest confirmed location several thousand miles distant in U.S. southeast.

Best fit seems to be Physcoonia enteroxantha
By: Daniel B. Wheeler (Tuberale)
2014-05-27 12:02:52 CDT (-0500)

with “marginal soralia” and some at least some pruina scattered over lobes.

P, detersa
By: Daniel B. Wheeler (Tuberale)
2014-05-27 11:56:04 CDT (-0500)

should have “marginal soralia”; this does not. Also, the range for Physconia detersa is distant from this locale.

This totally looks like a Pyxine!
By: Jason Hollinger (jason)
2014-05-27 11:38:26 CDT (-0500)

But no Pyxine occur in that region, so it’s got to be a very misleading Physconia.

Created: 2014-05-25 00:05:30 CDT (-0500)
Last modified: 2014-05-27 12:09:03 CDT (-0500)
Viewed: 29 times, last viewed: 2019-07-13 11:18:24 CDT (-0500)
Show Log