Observation 109154: Graphis scripta (L.) Ach.
When: 2012-08-06
Herbarium specimen reported

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Recognized by sight

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Specimen confirmed by Jim Bennett
By: Andrew Khitsun (Andrew)
2013-12-29 07:50:47 PST (-0800)
You’re right
By: Andrew Khitsun (Andrew)
2012-09-09 16:04:22 PDT (-0700)

I have many photos of this species, and most of the time they don’t have wide margin because they’re being encroached upon by competitors. On the other hand, those free of competition seem to develop this wide margin. But none of them have such a dramatic color difference: usually thallus is duller, or apothecia are grayer (or both). This one is like a newspaper print. And I don’t know anything about Graphis intricata either, except it’s supposed to come up from south up the Mississippi valley all the way to Wisconsin. I couldn’t find a photo of a complete thallus anywhere.

I wonder
By: Jason Hollinger (jason)
2012-09-09 15:52:52 PDT (-0700)

There are few other choices for species of Graphis that far north (unless it’s this G. intricata, I don’t know anything about it except that it seems to be very rare in Wisconsin). Is it just that these specimens aren’t competing with anything else, so we can see the full growing margin before it initiates apothecia production?

These stand out
By: Andrew Khitsun (Andrew)
2012-09-09 15:38:45 PDT (-0700)

From their brethren of the same species, by having this wide off-white rim of sterile thallus (prothallus?)

Created: 2012-09-09 15:34:38 PDT (-0700)
Last modified: 2012-09-09 15:37:27 PDT (-0700)
Viewed: 31 times, last viewed: 2016-05-12 08:33:02 PDT (-0700)
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