Another moss from my August vacation to New York and Connecticut. This one is Atrichum crispum. Unlike other Atrichum species, this one does not have lamellae running down the midrib. It has relatively large translucent leaves and teeth on the edges. The leaf blade is smooth but slightly folded into a V when wet. It is a bit challenging to tell this one from a Miniaceae without capsules. The capsules of Atrichum release spores via a salt-shaker mechanism, whereas the Miniaceae have peristome teeth that move in response to changes in humidity.
Fortunately I had my handy Common Mosses of the Northeast and Appalachians field guide with me to help with this identification.
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