Collection location: Spencer Island, Snohomish Co., Washington, USA [Click for map]
Notes: on bark of dead branch Alnus Rubra
this is an area of relatively low air quality (near interstate highway and agriculture)
Jason Hollinger suggested Lecanora strobilina – thanks again!
spores average 11.5 × 5 micron
of interest – according to Brodo et al. “After long storage, specimens of L. strobilina develop a fine white fuzz of tiny, straight, colorless crystals characteristic of lichens containing zeorin or other triterpenes.”
only eastern part of North America on the range map of Brodo et al., but “apparently fairly frequent in PNW” according to McCune, who also says “Most of the populations from the PNW have a whitish thallus, occur primarily on bark of deciduous trees and shrubs, and produce abundant terpenoid crystals after about 5 years in the herbarium” – we shall see
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Jason tells me that L. strobilina “doesn’t occur in the northwest, instead there are a
bewildering set of alternatives with varied chemistry, etc. (L.
confusa, perconfusa, substrobilina, etc.)”
Another one that grows abundant “fuzz” in the herbarium is Niebla cephalota. Looks like it also contains triterpenes. Must be particularly strong in the soralia of that species, because it goes crazy after just a few years.
Created: 2012-02-21 08:34:14 CST (+0800)
Last modified: 2012-02-21 08:34:16 CST (+0800)
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