Observation 19189: Ramalina americana Hale

When: 2009-03-05

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

Who: Chris Parrish (kitparrish)

Specimen available

Notes:
Locations:
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).

Photos:
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.

References:
Sharnoff’s Ramalina americana gallery
CNALH images and locality map, and a larger, interactive locality map.

Voucher specimen: Tennessee, Franklin County, Sewanee, central campus, 16 Mar 2009, Chris Parrish 0013, det. Gary Perlmutter (NCU)

Common name: sinewed ramalina

Species Lists

Images

Beckwith’s Point Trail, 2009-03-08
Central campus, 2009-03-05
Central campus, 2009-03-05
Central campus, 2009-03-05
Central campus, 2009-03-05
Central campus, 2009-03-05
branches, 7.1x
branches, 16x
branch, 16x
branch, 20x
branch, 12.5x
branch, 32x
branch surface, 25x
branch surface, 32x
pseudocyphella, 16x
pseudocyphella, 25x
pseudocyphella interior, 50x
pseudocyphella rim, 50x
pseudocyphellae, 40x
section thru branch, 100x
cortex KC+ yellow (usnic acid)

Proposed Names

28% (1)
Used references: Brodo, Sharnoff, and Sharnoff, pp. pp.621-622

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= Observer’s choice
= Current consensus

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