In summer it looked like this:

Sensitive to frost, it now looks like this:

The little beads that hold the spores have set and will stay like this through the winter:

Sensitive Fern (Onoclea sensibilis):

• Lady Bird Johnson:  http://www.wildflower.org/plants/result.php?id_plant=ONSE
• USDA Plant Database:  http://plants.usda.gov/core/profile?symbol=ONSE