Collection location: Sewanee, Franklin Co., Tennessee, USA [Click for map]
35°12’15.59"N, 85°55’13.48"W, el. 589 m, Central campus.
35°12’38.36"N, 85°54’0.40"W, el. 587 m, Beckwith’s Point Trail.
Substrate: Four separate tufts growing with other lichens on a downed tree branch about 1 m long and 2 cm thick, evidently from the canopy of adjacent forest (central campus); on the trunk and main branches of a small ornamental tree beside a principal road through town (Beckwith’s Point Trail).
Habitat: Park-like area with lawn and scattered ornamental bushes bordering a parking lot and remnant of eastern deciduous woodland with introduced ornamental trees as well (central campus); small roadside ornamental tree (Beckwith’s Point Trail).
Central campus, 2009-03-05: 38492-38510
Central campus, 2009-03-16: 39354
Beckwith’s Point Trail, 2009-03-08: 38713
Characterization: pale green, Usnea-colored, fruticose lichen with
(1) shrubby, tuft-like shape
(2) broad, strap-like, ascending branches, sometimes with flaring ends suggesting moose antlers
(3) prominent white, turret-shaped, cup-like pseudocyphellae
Chemistry: (central campus)
cortex C-, K-, KC+ yellow
medulla: C-, K-, KC-
Identification: Ramalina americana group (Needs TLC; it may be R. culbersoniorum)
Sewanee is near the distributional boundary between two chemotypes of Ramalina: R. americana to the N of here, with usnic acid, and R. culbersoniorum to the W, S, and SE of here with a number of lichen substances in the medulla. Both forms may occur here.
Voucher specimen: Tennessee, Franklin County, Sewanee, central campus, 16 Mar 2009, Chris Parrish 0013, det. Gary Perlmutter (NCU)
Common name: sinewed ramalina
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