Observation 35172: Xanthoparmelia plittii (Gyeln.) Hale

When: 2010-03-28

Collection location: Look Rock, Chilhowee Mountain, Blount Co., Tennessee, USA [Click for map]

Who: Chris Parrish (kitparrish)

No specimen available

Locality: 35°38’0.34"N, 83°56’29.38"W, el. 805 m, Foothills Parkway.

Substrate and habitat: Growing on exposed native rocks and on hand-hewn rocks forming the curb of a visitor parking lot near the ridge-like crest of Chilhowee Mountain in an open deciduous forest.

medulla C-, K+ yellow (immediately), KC- (dissolves the yellow), Pd+ yellow to orange (quickly)

Identification: The three species of Xanthoparmelia reported from the adjacent Great Smoky Mountains NP (Bennett-Wetmore lichen checklist for GSMNP) can be distinguished as follows (Hinds and Hinds, 2005, pp.518-522):
Xanthoparmelia conspersa (isidiate; lower cortex black)
Xanthoparmelia cumberlandia (nonisidiate; lower cortex light to dark brown)
Xanthoparmelia plittii (isidiate; lower cortex tan to dark brown)
These photos are of a densely isidiate Xanthoparmelia with a pale creamy lower cortex, so I take them to represent Xanthoparmelia plittii.

Sharnoff’s Xanthoparmelia plittii gallery
CNALH images and locality map, and a larger, interactive locality map.

Common name: Plitt’s rock-shield

Species Lists



Proposed Names

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Used references: Brodo, Sharnoff, and Sharnoff, 2001, pp.733-742; Hinds and Hinds, 2005, p.518-522

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Created: 2010-03-30 13:51:49 PDT (-0700)
Last modified: 2010-04-11 18:42:26 PDT (-0700)
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