Observation 34508: Parmotrema xanthinum (Müll. Arg.) Hale
When: 2010-02-21
Herbarium specimen reported

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

Substrate and habitat: Growing on an exposed sandstone cliff face, in oak-dominated, eastern deciduous woodland near the western rim of the Cumberland Plateau.

Chemistry:
cortex: C-, K-, KC-, Pd- [KC+ yellow expected, usnic acid]
medulla: C-, K-, KC-, Pd-

Identification: A yellow-green, saxicolous Parmotrema with prominent marginal cilia and abundant cylindrical, branching, or coraloid isidia; short setae sometimes emerging from the isidia; lower cortex black. Parmotrema madagascariaceum is “morphologically identical” (Showman and Flenniken, 2004, p.159) and has “the same geographic range” (Brodo, et al., 2001, p.502), but it has a different chemistry.

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

Voucher specimen:
United States, Tennessee, Franklin County, Sewanee, Rutledge Point Trail. 21 Feb 2010. Chris Parrish 0065, det. James C. Lendemer (NY).

Common name: green ruffle lichen

Species Lists

Images

80428
80429
80430
80431
80432
marginal isidia, 40x
80433
laminal isidia, 50x
80434
isidia with bristles, 80x
80435
black lower cortex, 16x

Proposed Names

85% (1)
Eye3 Eyes3
Used references: By comparison with MO Observation #19070. Voucher specimen identified by James C. Lendemer (NY).
Based on chemical features: medulla: C-, K-, KC-, Pd-

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2010-03-04 19:25:32 PST (-0800)
Last modified: 2010-06-08 23:39:06 PDT (-0700)
Viewed: 262 times, last viewed: 2016-11-09 09:04:13 PST (-0800)
Show Log