Observation 19469: Pyxine sorediata (Ach.) Mont.
When: 2009-03-15
Herbarium specimen reported

Notes: Location: 35°13’49.26"N, 85°57’47.14"W, el. 575 m, Dotson Point Trail.

Substrate: Growing on the trunks of trees, often about 2 m above the ground.

Habitat: Oak-hickory woodland on the western rim of the Cumberland Plateau.

Chemistry:
cortex C-, K-, KC-, UV-
medulla C-, K- (going dingy, dissolving the yellow medulla color)

Characterization: corticolous blue-green rosette lichen with
(1) outermost lobes rounded
(2) lobes with prominent white lateral margins (pseudocyphellae)
(3) pillow-like mounds of soredia
(4) medulla pale yellow to creamy under algal layer
(5) rhizines short, gray, mostly not conspicuous on lobes or margins; row of short, squat marginal teeth along lobe margin
(6) central undersurface black
(7) undersurface of outer lobes pale tan, with cortex (not fibrous or cottony)

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

Voucher specimen: Tennessee, Franklin County, Sewanee, Dotson Point Trail, 15 Mar 2009, Chris Parrish 0009, det. Gary Perlmutter (NCU)

Common name: mustard lichen

Species Lists

Images

39299
Dotson Point Trail, 2009_03_15
39300
Dotson Point Trail, 2009_03_15
42431
thallus, 7.1x
42432
thallus, 10x
42433
white margins, 25x
42435
marginal soredia, 20x
42436
mounds of soredia, 10x
42437
mounds of soredia, 12.5x
42438
mounds of soredia, 16x
42439
medulla yellow under cortex, 32x
42440
medulla yellow under cortex, 50x
42441
creamy medulla under algal layer, 100x
42442
cortex of undersurface of lobe, peg-like teeth,50x
42443
undersurface, peg-like teeth, 32x
42444
black central undersurface, 20x
42445
branching rhizines, 63x

Proposed Names

28% (1)
Eye3 Eyes3
Used references: Brodo, Sharnoff, Sharnoff, pp. 617-619

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-03-17 00:32:23 CDT (-0500)
Last modified: 2009-03-17 00:32:23 CDT (-0500)
Viewed: 354 times, last viewed: 2016-11-10 08:46:05 CST (-0600)
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