How does a fern leaf unfurl?

Let me count the ways.

Unfurling fernOlympic National Park, Washington
May 2015
PNW15084

Unfurling fernOlympic National Park, Washington
May 2015
PNW15113

Unfurling fernOlympic National Park, Washington
May 2015
PNW15162

Unfurling fernOlympic National Park, Washington
May 2015
PNW15091

Unfurling fernOlympic National Park, Washington
May 2015
PNW15092

Unfurling fernOlympic National Park, Washington
May 2015
PNW15221