Observation 70622: Pyxine sorediata (Ach.) Mont.

When: 2011-06-25

Collection location: Parque de Monsanto, Lisboa, Portugal [Click for map]

Who: zaca

No specimen available

Notes:
This one is completely different from what I observed before. Here are some features:
- the more remarkable is the “frosted” zone near the margin of thallus;
- the lobes are almost flat at the center and concave at the margin;
- sorediate, mainly at the center of thallus.
According to CNALH the above mentioned “frosted” zone is a distinguish feature of P. undulata. I didn’t find conclusive photographs. Can it be this species?

Images

155031
155032
155033
155034

Proposed Names

29% (1)
Eye3
Used references: CNALH
56% (1)
Eyes3
Recognized by sight: distinctive pattern of pruina on lobe tips but not on margin; coarse soredia

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
I should …
By: zaca
2011-07-01 19:11:31 CEST (+0200)

… have recognized that with these lobes could not be Physcia. Thankfully, Jason corrected me.

Perfect example of Pyxine
By: Jason Hollinger (jason)
2011-07-01 02:44:45 CEST (+0200)

There is at least one other species (P. subcinerea) very similar to this which can be distinguished by having a UV+ yellow cortex. If you scratched either open, you should see a strongly mustard-yellow colored medulla.

Created: 2011-07-01 01:45:31 CEST (+0200)
Last modified: 2011-07-01 02:41:28 CEST (+0200)
Viewed: 38 times, last viewed: 2017-06-09 22:51:03 CEST (+0200)
Show Log