When: 2009-03-08

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

Who: Chris Parrish (kitparrish)

Specimen available

Notes:
Location: 35°12’38.36"N, 85°54’0.40"W, el. 587 m, Beckwith’s Point Trail.

Substrate: Growing with other lichens on the trunk of a dead but still standing tree (about 10 cm DBH).

Habitat: oak-hickory woodland near the western escarpment of the Cumberland Plateau

Chemistry:
cortex C-, K+ yellow turning orange
medulla: C-, K- (bleeds yellow → red from nearby cortex)

Characterization: small ruffle lichen with
(1) exceptionally long, ascendent marginal setae;
(2) marginal soredia
(3) undersurface broadly white
(4) rhizines absent near thallus margin

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

Voucher specimens:
United States, 
Tennessee, Franklin County, Sewanee, Beckwith’s Point Trail. 08 Mar 2009. Chris Parrish 0002, det. Gary Perlmutter (NCU)
United States, 
Tennessee, Franklin County, Sewanee, Woodlands. 07 Feb 2010. Chris Parrish 0042, det. James C. Lendemer (NY)

Common name: powdered ruffle lichen

Species Lists

Images

lobe margin, 25x
lobe, 16x
marginal soredia, 20x
marginal soredia, 25x
marginal soredia, 25x
marginal soredia, 50x

Proposed Names

28% (1)
Used references: Brodo, Sharnoff, Sharnoff, pp.490-491
57% (1)
Recognized by sight: “this is a marginal ID, as the specimen is small, sterile and poorly developed, likely immature,” Gary Perlmutter

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= Observer’s choice
= Current consensus

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