Observation 19734: Ramalina petrina Bowler & Rundel
When: 2009-03-22
Herbarium specimen reported

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

Substrate: Growing on dry sandstone rock faces with southern exposure to direct sun and few or no other epiphytes on the rock. In all occurrences found so far the rock has been part of or next to a major sandstone cliff.

Habitat: Oak-dominated eastern deciduous woodland at the western rim of the Cumberland Plateau.

Chemistry:
cortex: C-
soredia: C- or possibly just barely a trace of a C+ dingy reaction
cortex and soredia: K+ yellow immediately
cortex and soredia: KC- still yellow
               to dull yellow in two places very slowly
               to dull brownish yellow
               to gold (over several minutes)

Ramalina petrina is “an uncommon Appalachian chemical variant” of Ramalina intermedia (Brodo, et al., 2001, p.624). It’s cliff-face habitat is extensive in this area, but usually difficult to access. Another small population of similar-looking individuals has been found a few km from the original site.

Voucher specimen: Tennessee, Franklin County, Sewanee, Rutledge Point Trail, 22 Mar 2009, Chris Parrish 0029, det. Gary Perlmutter (NCU)

Common name: rock ramalina

Species Lists

Images

39886
Rutledge Point Trail, 22 Mar 2009
39892
thallus, 7.1x
39893
soredia, 12.5x
39896
soredia, 25x
39897
soredia, 25x
39900
soredia and cortex, 50x
39901
soredia and cortex, 25x
39902
soredia, 20x
39903
soredia, 20x
39904
soredia, 25x
39905
soredia, 40x
39906
soredia, 40x
39907
soredia, 50x
39908
soredia, 50x
39909
thallus, 10x
39910
thallus, 16x
39911
branch, 20x
39912
x-section of branch, 100x
42208
Rutledge Point Trail, 22 Mar 2009
42209
Rutledge Point Trail, 22 Mar 2009
42210
Rutledge Point Trail, 22 Mar 2009
42211
Rutledge Point Trail, 22 Mar 2009

Proposed Names

28% (1)
Eye3
Used references: Brodo, Sharnoff, Sharnoff, pp.624-625
56% (1)
Eye3
Used references: Brodo, Sharnoff, Sharnoff, pp.624-625
85% (1)
Eye3 Eyes3
Recognized by sight: Specimens identified by Gary Perlmutter at the UNC Herbarium as Ramalina petrina
Based on chemical features: medulla PD+ orange-red

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-03-24 07:17:06 CST (+0800)
Last modified: 2009-03-24 07:17:06 CST (+0800)
Viewed: 123 times, last viewed: 2016-09-12 11:08:24 CST (+0800)
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