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Physcia adscendens

Physcia adscendens (Fr.) H. Olivier

 

Hooded Rosette Lichen, Rosette Lichen

KingdomFungiMushrooms, lichens, gel fungi, yeasts, and molds; also called eukaryotes
DivisionAscomycotaSac fungi
SubdivisionPezizomycotinaSac fungi with filaments
ClassLecanoromycetes“Lichenized” fungi
OrderLecanoralesMostly lichen-forming fungi
SuborderLecanorineaeLichens
FamilyPhysciaceae
GenusPhyscia
Speciesadscendens

About plant names...

I cannot find a range map for hooded rosette lichen, but it occurs along the east and west coasts of North America.

Identification: Technically, this is a foliose lichen. It has an uneven branching pattern, and thickened branches, but they are not flat against the branches as with some lichens. The lichen is a powdery pale gray to greenish gray in color, sometimes with a yellow portion. It is very common. This is often found together with Physcia tenella. It appears on twigs and bark, as well as concrete and other walls, and occasionally on rocks.

Online References:

Physcia adscendens on Stephen Sharnoff Photography

Physcia adscendens on the Stridvall Family Domain

Physcia adscendens on Wikimedia Commons

Physcia adscendens on www.irishlichens.ie

Physcia adscendens on Lichenology.info: Lichens of Belgium, Luxembourg and northern France

References:

Walewski, Joe, Lichens of the North Woods, Kollath+Stensaas Publishing, 2007, p. 121

Physcia adscendens description by Thomas H. Kent, last updated 16 Aug 2013.

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Physcia adscendens (Hooded Rosette Lichen, Rosette Lichen)

9/18/2009 · Acadia National Park, Bar Harbor, ME
≈ 23 × 15" (58 × 38 cm) ID is uncertain

Physcia adscendens (Hooded Rosette Lichen, Rosette Lichen)

9/20/2014 · Owl’s Head Lighthouse, Owl’s Head, ME ID is uncertain