Collection location: Boston Bar, Fraser Regional District, British Columbia, Canada [Click for map]
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
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sum(score * weight) /
(total weight + 1)
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)?
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)
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