Commonly called Red Roof Moss or Fire Moss. Difficult to see in this picture, but I found this moss all over the bridge, suspected it to be Red Roof Moss because it commonly grows in a variety of usually inhospitable habitats (like sidewalks). Further, it had the distinctive red-green coloring of the Red Roof Moss. Also examined the sporophyte under the dissecting microscope, and recognized the distinctive shape of its capsule.
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