Fern of eastern North America with pale green fronds and an aroma like hay WordNet 3.0 & Open English WordNet

Dennstaedtia punctilobula, the eastern hayscented fern or hay-scented fern, is a species of fern native to eastern North America, from Newfoundland west to Wisconsin and Arkansas, and south in the Appalachian Mountains to northern Alabama; it is most abundant in the east of its range, with only scattered populations in the west.It is a deciduous fern with fronds growing to 40–100 cm tall and 10–30 cm broad; the fronds are bipinnate, with pinnatifid pinnules about three times as long as broad. Wikipedia

Dennstaedtia punctilobula, native to cool-temperate eastern North America. Wiktionary