When: 2006-06-27

Collection location: Cabin Cove, Haywood Co., North Carolina, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

Crust lichen, on hardwood bark.
THALLUS: light grey-green, very verrucose and cracked showing white through from below, K-, C-, KC-
MEDULLA: white, C-, K+ orange to reddish-brownish, KC-
ALGAE: green
APOTHECIA: buried inside white cottony pustules all over surface of thallus, very slightly pale pinkish
SPORES: 110-120 × 40-50 µm, wall 5-6 µm thick

This species isn’t fully described in Brodo, but what info is there matches well. It essentially keys out as P. ophthalmiza but with the weird orangish-brownish K reaction in the medulla.


Color balance is way off.
Spore in water, at 400×.
Spores in water, at 400×.

Proposed Names

87% (1)
Used references: Brodo: aborted sorediate apothecia, chemistry, spore size
Based on microscopic features: medulla K+ orange to reddish-brown
Based on chemical features: spore > 100 µm

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= Observer’s choice
= Current consensus


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