Observation 12269: Physconia isidiigera (Zahlbr.) Essl.
When: 2008-10-09
No herbarium specimen

Notes: Took a voucher collection of this lichen, found on ornamental pear tree at a local McDonald’s. Surface of lichen sea-green, or light blue-green, with pine-green edges which are knobbly (may be spore-bearing?). Back of lichen is mostly granulose dull black, but with many grayish-white rhizimes or root-like structures. Photos taken in the palm of my hand. Total collection about 3/4 inch across at widest point.

Proposed Names

5% (2)
Eye3
Recognized by sight
56% (1)
Eyes3
Recognized by sight: Either Physcia or Physconia; former is usually pale underneath; assuming the latter, then the strictly marginal soredia (knobbly stuff) indicate this species, which is supposed to be common throughout this area.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-10-09 14:20:38 PDT (-0700)
Last modified: 2008-10-09 14:20:38 PDT (-0700)
Viewed: 16 times, last viewed: 2016-03-20 17:29:56 PDT (-0700)