When: 2012-02-20

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

Who: Richard Droker (wanderflechten)

Specimen available

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

Species Lists


Proposed Names

83% (1)
Recognized by sight: closely resembles photos, e.g.these http://www.sharnoffphotos.com/... and others
Used references: Nash III, T.H., Ryan, B.D., Diederich, P., Gries, C. and Bungartz, F. (eds) (2004) Lichen Flora 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, Brodo, Irwin M., Sharnoff, Sylvia Duran and Sharnoff, Stephen (2001) Lichens of North America
Based on microscopic features: apothecial anatomy

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

= Observer’s choice
= Current consensus


Add Comment
By: Jason Hollinger (jason)
2012-06-01 16:36:45 MST (-0700)
to be re-identified
By: Richard Droker (wanderflechten)
2012-06-01 16:11:41 MST (-0700)

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.)”

Get back to me on the zeorin crystals. :)
By: Jason Hollinger (jason)
2012-02-20 17:45:29 MST (-0700)

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: 2012-02-20 17:34:14 MST (-0700)
Last modified: 2012-02-20 17:34:16 MST (-0700)
Viewed: 89 times, last viewed: 2019-04-20 14:24:52 MST (-0700)
Show Log