Observation 88087: Lecanora Ach.

When: 2012-02-21

Collection location: Spencer Island, Snohomish Co., Washington, USA [Click for map]

Who: Richard Droker (wanderflechten)

Specimen available

on bark of dead branch Alnus Rubra

this is an area of relatively low air quality (near interstate highway and agriculture)

with http://mushroomobserver.org/obs/88016?q=Brkd and http://mushroomobserver.org/obs/88069?q=Brkd

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 – ?

Species Lists


image 11mm across
both with KOH
pycnidium 200 × 150 microns

Proposed Names

83% (1)
Eye3 Eyes3
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I get the crystals wrong sometimes
By: Jason Hollinger (jason)
2012-02-28 19:38:16 CST (-0500)

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.

thanks Jason
By: Richard Droker (wanderflechten)
2012-02-28 18:58:31 CST (-0500)

Thanks Jason. Perhaps it is something akin to L. subrugosa or L. argentata. Thinking I’ll leave it for now, particularly as its such a small specimen.

One of my photos (which I’ll upload) seems to have some crystalline material in the epihymenium (in H2O)

By: Jason Hollinger (jason)
2012-02-21 14:48:25 CST (-0500)

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 14:26:48 CST (-0500)
Last modified: 2012-02-21 14:34:03 CST (-0500)
Viewed: 47 times, last viewed: 2017-06-10 10:31:36 CDT (-0400)
Show Log