Verrucaria margacea
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Verrucaria margacea 1 (photographed dry) On streambed rock. From Buffalo Pass, Routt National Forest, Rocky Mountains, Colorado. |
Verrucaria margacea 2 (the same or adjacent thallus, photographed underwater) On streambed rock. From Buffalo Pass, Routt National Forest, Rocky Mountains, Colorado. |
Verrucaria margacea 3 V. margacea is in the center; the pale gray patches on the edge are Verrucaria aethiobola. On river rock. From Willamette National Forest, Oregon. |