When: 2017-08-23

Collection location: Óbidos, Portugal [Click for map]

Who: zaca

No specimen available

Same place than Observation 212323, also growing on the bricks of the fence surrounding a monument there. As in that case, the tiny urceolate apothecia and the whitish thallus make the ID plausible.


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By: zaca
2017-08-29 13:01:03 EDT (-0400)

The spores of D. actisnostomus seem to be wider (say of oblong form) and have more cells.

By: Jason Hollinger (jason)
2017-08-29 12:46:50 EDT (-0400)

I hadn’t noted the difference in spore length. I also see that D. actinostomus never has diploschistesic acid, while D. scruposus can.

Maybe that …
By: zaca
2017-08-29 07:38:49 EDT (-0400)

D. actinostomus is characterized by the tiny urceolate apothecia and by the spore shape.

Most convincing specimen of D. actinostomus I’ve ever seen!
By: Jason Hollinger (jason)
2017-08-28 13:31:09 EDT (-0400)

There are so many apparently intermediate specimens where some or most of the apothecia are constricted to tiny ostiole-like openings, but where at least some of the apothecia eventually dilate and look more typical of D. scruposus.

Do you find that there is an obvious separation between the two taxa in your area?