Lady fern (Athyrium filix-femina), also known as the alpine lady fern, is an uncommon plant in Colorado but can be found in 49 out of 50 states, excluding Hawaii, making it one of the most abundant ...

This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...