When: 2009-02-27

Collection location: Sewanee, Franklin Co., Tennessee, USA [Click for map]

Who: Chris Parrish (kitparrish)

No specimen available

Location: 35°13’21.51"N, 85°57’3.86"W, el. 572 m, Rutledge Point Trail.

Substrate: Growing on sandstone rocks at the rim of the escarpment.

Habitat: eastern deciduous woodland on the western escarpment of the Cumberland Plateau.

Chemistry: cortex C-, K-; medulla C-, K+ yellow, KC-.

Characterization: ruffled lichen with
(1) thallus pale silvery gray
(2) puffy, elliptical soralia perched on the tips of ascending marginal lobes
(3) lower surface black at the center, brown at the edges (accenting the pale soredia)
(4) cortex K+ yellow (atranorin)
(5) medulla K+ yellow or orange

Sharnoff’s Parmotrema reticulatum gallery
CNALH images, description, and locality map, and a larger, interactive locality map.

Common name: powdered ruffle lichen

Species Lists


thallus, 16x
sorediate margin, 16x
sorediate margin, 40x
sorediate margin, 16x
sorediate margin, 25x
sorediate margin, 50x
undersurface, about 16x
undersurface, 16x
undersurface, 32x

Proposed Names

-28% (1)
Used references: Brodo, Sharnoff, and Sharnoff, p.493
-28% (1)
Used references: In the Checklist of NA Lichens, P. chinense is listed as a synonym of P. perlatum. Brodo (2001, p.493) has it the other way around.
28% (1)
Recognized by sight: By comparison with MO observation #33597

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= Observer’s choice
= Current consensus


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