Observation 130116: Lecanora chlarotera Nyl.
When: 2013-03-11

Notes: 1.r x 30cm branch Prunus emargiata above Frasier River which has 15 or 16 species of lichen (see http://mushroomobserver.org/130007?q=17gG6)

although thallus thin L. chlarotera seems to fit better than L. pacifica (Jason – am I missing something?)

note interesting parasite interaction last 2 photos – I’ll look into this


Hypothesis – Lecanora seems to have white thallus with greenish overgrowth associated with parasite in last image.
also in this photo – Candelariella vitellina, Lecidella elaeochroma, Melanohalea multispora (or possibly M. subolivacea), Parmelia sulfate, Physcia stellaris, Physcia tenella, Rinodina species, Xanthomendoza hasseana (out of focus)
both sides in H2O
both sides in KOH
interesting parasitism (?) still to examine
best view full size

Proposed Names

28% (1)
Eye3 Eyes3
Used references: B.D. Ryan et al. in Nash III, T.H., Ryan, B.D., Diederich, P., Gries, C. and Bungartz, F. (eds) (2004) Lichen FloBrodo, Irwin M., Sharnoff, Sylvia Duran and Sharnoff, Stephen (2001) Lichens of North Americara of the Greater Sonoran Desert Region, Volume 2; Smith, C.W., Aptroot, A., Coppins, B.J., Fletcher, A., Gilbert, O.L., James, P.W. and Wolseley, P.A. (2009) The Lichens of Great Britain and Ireland
Based on microscopic features: hymenium 50u; spores 8/asc, hyaline, ave 13×7u; paraphyses simple
Based on chemical features: crystals epihymenium soluble KOH; large crystals exciple insoluble KOH; apo margin K+yel, apo disk C-

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
“misery love company”?
By: Jason Hollinger (jason)
2013-03-20 16:12:45 PDT (-0700)


By: Richard Droker (wanderflechten)
2013-03-20 08:44:48 PDT (-0700)

I will need to spend some time on consideration of your options, and get back on this. Thank your very much for them.

Is there a word akin to shadenfreude for pleasure derived from shared misfortune (of confusing lichens)?

I find this such a difficult group
By: Jason Hollinger (jason)
2013-03-14 12:25:30 PDT (-0700)

The options as I see it are:

(epihymenial crystals/granules fine and inspersed into upper hymenium)
L. circumborealis — amphithecial cortex distinctly basally thickened (11.5-17.5 × 7.5-10.0 µm)
L. hybocarpa — ~uniform cortex, P- (12.0-14.0 × 5.5-7.0 µm)
L. pulicaris — ~uniform cortex, P+ (9.5-13.0 × 7.0-9.0 µm)

(epihymenial crystals coarse and sitting on top of paraphyses)
L. pacifica — more basally-thickened, grayer? (10.5-14.0 × 9.0-11.0 µm)
L. chlarotera — less basally-thickened, less gray? (13.5-15.0 × 6.0-7.0 µm)

I don’t know how to read the epihymenial crystals yet, so no comment there. I would’ve said your specimen had clearly basally-thickened cortex (as seen in the micro shots showing the entire apothecium, but the close-up polarized shot seems to indicate uniform cortex). But your spore size would seem to rule out both of the species which have basally thickened cortex!

As usual, I just wind up twisted into knots, more confused than when I started.

Created: 2013-03-11 19:33:45 PDT (-0700)
Last modified: 2013-03-11 19:34:55 PDT (-0700)
Viewed: 81 times, last viewed: 2016-10-26 18:40:22 PDT (-0700)
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