Stair-step Moss
... that the age of a Stair-step Moss can be estimated by counting the number of "steps"?
... that the age of a <b id="mwB6E"><a href="./Hylocomium_splendens" id="mwB6I" rel="mw:WikiLink" title="Hylocomium splendens">Stair-step Moss</a></b> <i id="mwB6M">(pictured)</i> can be estimated by counting the number of "steps"?