Observation 12353: Platismatia norvegica

When: 2008-10-11

Collection location: Larch Mountain, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Lichen very broadly lobed, with frilled edges, surface pale mint green with raised white ridges; reveres with scurfy white with meandering veins (white), becoming dark brown or black with age, and having a reticulate white veined appearance in those darker colored areas.


Proposed Names

5% (2)
Recognized by sight
29% (1)
Recognized by sight: I saw Lobaria oregana displayed at the Oct. 12, 2008 OMS Fall Mushroom Show, and this looks to be very close to it. But I am not, as yet, a precise enough identifier of lichens to bet on it.
84% (1)
Used references: Brodo: isidia/soredia on the surface instead of margins, underside black and white without any rhizines or felt

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= Observer’s choice
= Current consensus


Add Comment
Thanks, Jason.
By: Daniel B. Wheeler (Tuberale)
2008-10-14 15:38:52 CEST (+0200)

BTW, my hopes to obtain Brodo fell flat on Sunday. Maggie Rogers, who owns Fungal Cave Books, has heard of Brodo, but doesn’t know of anyone that might have him for under $100. Will be checking Powell’s Book Store now. Maybe I can get McCune, at least. John Davis, who was at the OMS Fall Show, knows McCune personally, and recommends I get the most recent edition possible, since there have been errors in it. He also mentioned the neat trick with Usnea about pulling a branch. If Usnea, it will have a central stretchy core.

Platismatia norvegica
By: Jason Hollinger (jason)
2008-10-14 09:05:36 CEST (+0200)

Neat, I’ve never seen this one! Lobaria have a tomentose undersurface and very broad lobes, and the undersurface is varying degrees of brown with white pale spots. Platismatia is a sharply-wrinkly, ruffled, foliose lichen with no rhizines but fully-corticate lowersurface that has a distinctive black and white coloration underneath. So this one is definitely Platismatia. P. glauca has marginal soredia/isidia, according to Brodo, while P. norvegica has laminal (and is more sharply wrinkled/ridged). It only occurs in very moist areas and old-growth forests. (Much like Lobaria, incidentally.) P. glauca is much more common and wide-spread, occurring pretty much anywhere it is bright and it occasionally rains on the west coast (including the mountains of southern California, believe it or not).

Created: 2008-10-12 07:25:50 CEST (+0200)
Last modified: 2008-10-12 07:25:50 CEST (+0200)
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