Photograph of a herbarium specimen taken through a dissecting microscope (x40), showing a dark brown to black, areolate thallus.
This specimen of Verrucaria nigrescens was growing on a serpentine rock along the stone road under the high voltage power lines about .25 mile S of the Red Dog Lodge and Serpentine Trail at the Soldiers Delight Natural Environment Area, Owings Mills, Baltimore County, Maryland, USA.
Collected and determined by E.C. Uebel (No. U-598, 17 May 2006).
Date
6 August 2007 (upload date)
Source
self-made (Photographed on 29 May 2006 by me, Ed Uebel)
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{{Information |Description='''''Verrucaria nigrescens''''' Pers., 1795 Photograph of a herbarium specimen taken through a dissecting microscope, x40. This specimen of ''Verrucaria nigrescens'' was growing on a serpentine rock along the stone road unde