Photograph of two spores (3-septate, 4-celled) from Arthonia caesia taken through a compound microscope, x 1000. (spores measure 21 x 5 microns)
This specimen of Arthonia caesia was growing on the bark of a dying Norway Maple (Acer platanoides L.) in a front yard along Ridge Road in western Baltimore County, Maryland, USA.
Collected and identified by E.C. Uebel (No. U-470, 23 Aug 2001).
Date
Source
self-made (Photographed on 28 Jul 2003 by me, Ed Uebel)
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{{Information |Description='''''Arthonia caesia''''' (Flotow) Körber, 1861 Photograph of two spores (3-septate, 4-celled) from ''Arthonia caesia'' taken through a compound microscope, x 1000. (spores measure 21 x 5 microns) This specimen of ''A