File:Collema nigrescens-2.jpg

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Collema_nigrescens-2.jpg (720 × 491 pixels, file size: 128 KB, MIME type: image/jpeg)

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Description

Collema nigrescens (Hudson) DC., 1805

Photograph of the upper surface of a lobe taken through a compound microscope (x400) showing the absence of a cellular cortex.   Compare with Leptogium cyanescens, which does have a cellular cortex.

The specimen of Collema nigrescens was growing on the bark of a tree near the Endless Mountain Retreat, S on County Road 601, approximately 2.4 miles from US 250 in Highland County, Virginia, USA; collected by E.C. Uebel, identified by Don Flenniken (No. U-381, 8 Jun 2002).
Date 30 July 2007 (upload date)
Source self-made (Photographed on 13 Jun 2002 by me, Ed Uebel)
Author Ed Uebel

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Date/TimeThumbnailDimensionsUserComment
current13:56, 30 July 2007Thumbnail for version as of 13:56, 30 July 2007720 × 491 (128 KB)Ed Uebel~commonswiki (talk | contribs){{Information |Description='''''Collema nigrescens''''' (Hudson) DC., 1805 Photograph of the upper surface of a lobe taken through a compound microscope (x400) showing the absence of a cellular cortex.   Compare with [[Image:Leptogium cyanescens-9.

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