Observation 23403: Cladonia P. Browne

When: 2009-07-21

Collection location: Southeast Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

I feel I must apologize for the photos. The base of the lichen is a clustered clump of green to pale gray-green unturned thallus, with a single erect spore-producing structure in the very center of both photos. This structure was about 4mm tall, but tall enough that my camera would not focus on it distinctly. Structure had inrolled edges, and the outside was white. Growing on rhododendron in front of my home.



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Add Comment
Type of soredia important
By: Jason Hollinger (jason)
2009-07-21 23:38:42 CDT (-0400)

There are a number of grayish “pixie cups” like this one, distinguished by amount of cortex toward the base of the stalk if any, and size of the granules covering the outside of the cups. Yours is most likely something like C. pyxidata (“soredia” are tiny lumpy corticate squamules, especially check inside the cup) or C. chlorophaea group (soredia are granular all over) or C. asahinae (soredia supposed to be larger, sometimes even corticate). Also check to see if the granules cover the entire stalk all the way to the basal squamules, or whether the base of the stalk is smooth and corticate.

Created: 2009-07-21 21:10:34 CDT (-0400)
Last modified: 2009-07-21 21:10:34 CDT (-0400)
Viewed: 28 times, last viewed: 2017-06-06 01:53:16 CDT (-0400)
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