Notes: on bark of dead branch Alnus Rubra
this is an area of relatively low air quality (near interstate highway and agriculture)
K neg or very weak; largest apothecia 0.4mm; hymenium ca. 45 micron high; paraphyses simple ca. 1 micron and ca. 2 micron at apices; crystals insoluble in KOH; spores average 10.5 × 6
pycnospores variable length up to ca. 30 microns long and very thin
Jason – ?
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You’d think it was an easy either-or character, but I’ve been corrected several times when I thought it was obvious. Oh well. If the epihymenium is POL+ there are lots of additional options to consider. Ugh.
I can’t find any with 1) large insoluble crystals in amphithecium, 2) no crystals or granules in epihymenium, 3) K- thallus. Allow weak K+y, then I find L. subrugosa in BC, or L. subrugosa and L. argentata in Sonoran Flora. Both report larger spores than you do; and the Sonoran Flora doesn’t report conidia for L. subrugosa (it’s rare in southwest, I think).
Created: 2012-02-21 11:26:48 PST (-0800)
Last modified: 2012-02-21 11:34:03 PST (-0800)
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