Plant species are grouped by botanists into "families", based on various characteristics, usually flower structure. Families consist of plants that are closely related botanically.
Another way this website groups species is by "Group" - species that look alike somehow, but are not necessarily related to each other. In some cases, a Group of species may overlap a Family, in other cases, not.
Only families that have species on this site are listed.

List families by COMMON NAME OR by SCIENTIFIC NAME

Family Common Names

Adder's Tongue Family (Ophioglossaceae)
Bracken Family (Dennstaedtiaceae)
Chain Fern Family (Blechnaceae)
Club Moss Family (Lycopodiaceae)
Flowering Fern Family (Osmundaceae)
Horsetail Family (Equisetaceae)
Maidenhair Fern Family (Pteridaceae)
Marsh Fern Family (Thelypteridaceae)
Polypody Family (Polypodiaceae)
Spikemoss Family (Selaginellaceae)
Spleenwort Family (Aspleniaceae)
Wood Fern Family (Dryopteridaceae)

Family Scientific Names

Aspleniaceae (Spleenwort Family)
Blechnaceae (Chain Fern Family)
Dennstaedtiaceae (Bracken Family)
Dryopteridaceae (Wood Fern Family)
Equisetaceae (Horsetail Family)
Lycopodiaceae (Club Moss Family)
Ophioglossaceae (Adder's Tongue Family)
Osmundaceae (Flowering Fern Family)
Polypodiaceae (Polypody Family)
Pteridaceae (Maidenhair Fern Family)
Selaginellaceae (Spikemoss Family)
Thelypteridaceae (Marsh Fern Family)