Noun sweet fern has 2 senses
- common polypody, adder's fern, wall fern, golden maidenhair, golden polypody, sweet fern, Polypodium vulgare - mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia
--1 is a kind of polypody
- sweet fern, Comptonia peregrina, Comptonia asplenifolia - deciduous shrub of eastern North America with sweet scented fernlike leaves and tiny white flowers
--2 is a kind of shrub, bush
--2 is a member of Comptonia, genus Comptonia
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