Aspleniaceae: Spleenwort Family
Large-spored Spleenwort, Maidenhair Spleenwort, Tetraploid Spleenwort: Asplenium trichomanes ssp. quadrivalens
Maidenhair Spleenwort: Asplenium trichomanes ssp. trichomanes
Blechnaceae: Chain Fern Family
Deer Fern: Blechnum spicant (Synonyms: Blechnum spicant ssp. nipponicum, Blechnum spicant var. pensylvanica, Struthiopteris spicant)
Dennstaedtiaceae: Bracken Family
Western Brackenfern, Bracken Fern, Northern Bracken Fern: Pteridium aquilinum var. pubescens
Dryopteridaceae: Wood Fern Family
Common Ladyfern, Northwestern Ladyfern, Northwestern Lady Fern: Athyrium filix-femina var. cyclosorum (Synonym: Athryium filix-femina ssp. cyclosorum)
Brittle Bladderfern, Fragile Fern, Brittle Fern, Bladder Fern: Cystopteris fragilis (Synonyms: Cystopteris dicieana, Polypodium fragile) -
California Wood Fern, Coastal Woodfern, Marginal Wood Fern: Dryopteris arguta (Synonym: Aspidium argutum)
Spinulose Woodfern, Toothed Woodfern: Dryopteris carthusiana (Synonyms: Dryopteris austriaca var. spinulosa, Dryopteris spinulosa, Polypodium carthusianum, Polypodium spinulosum)
Spreading Woodfern, Spreading Wood Fern, Northern Woodfern: Dryopteris expansa (Synonyms: Dryopteris assimilis, Dryopteris dilatata, Dryopteris dilitata var. americana, Nephrodium expansum)
Male Fern: Dryopteris filix-mas
Common Oak Fern, Northern Oak Fern, Western Oak Fern: Gymnocarpium disjunctum (Synonyms: Dryopteris linnaeana, Gymnocarpium dryopteris, Gymnocarpium dryopteris var. disjunctum, Lastrea dryopteris, Phegopteris dryopteris, Polypodium dryopteris, Thelypteris dryopteris)
Holly Ferns and Sword Ferns: The Genus Polystichum
Anderson's Holly-fern, Anderson's Sword Fern, Vancouver Holly Fern: Polystichum andersonii (Synonyms: Polystichum braunii ssp. andersonii, Polystichum braunii var. andersonii)
Narrow-leaved Sword-fern, Imbricate Sword Fern: Polystichum imbricans ssp. imbricans (Synonym: Polystichum munitum var. imbricans)
Holly Fern, Mountain Hollyfern, Northern Holly-fern: Polystichum lonchitis (Synonym: Polypodium lonchitis)
Common Sword Fern, Western Sword Fern: Polystichum munitum (Synonyms: Aspidium munitum, Polystichum munitum var. munitum)
Mountain Holly Fern, Rock Sword Fern: Polystichum scopulinum (Synonyms: Aspidium aculeatum var. scopulinum, Polystichum mohrioides, Polystichum mohrioides var. scopulinum)
Oregon Cliff Fern, Oregon Woodsia, Western Cliff Fern: Woodsia oregana ssp. oregana
Rocky Mountain Woodsia, Laurentian Cliff Fern: Woodsia scopulina
Ophioglossaciae: Adder's-tongue Family
Mingan Moonwort: Botrychium minganense (Synonyms: Botrychium lunaria var. minganense, Botyrchium lunaria var. onondagense)
Common Grapefern, Rattlesnake Fern, Rattlesnake Grapefern, Virginia Grapefern: Botrypus virginianus (Synonyms: Botrichium virginianum, Osmunda virginiana)
Northern Adder's-tongue: Ophioglossum pusilum (Synonym: Ophioglossum vulgatum)
Leather Grapefern, Leathery Grapefern: Sceptridium multifidum (Synonyms: Botrychium californicum, Botrychium coulteri,Botrychium multifidum, Botrychium silaifolium, Osmunda multifida)
Polypodiaceae: Polypody Family
Irregular Polypody, Pacific Polypody: Polypodium amorphum (Synonym: Polypodium montense)
Licorice Fern: Polypodium glycyrrhiza (Synonyms: Polypodium aleuticum, Polypodium falcatum, Polypodium occidentale, Polypodium vulgare var. falcatum, Polypodium vulgare var. occidentale)
Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium)
Pteridaceae: Maidenhair Family
Aleutian Maidenhair, Northern Maidenhair Fern, Western Maidenhair: Adiantum aleuticum (Synonyms: Adiantum boreale, Adiantum pedatum, Adiantum pedatum var. aleuticum, Adiantum pedatum var. subpumilum)
Indian's Dream, Oregon Cliff Brake, Podfern: Aspidotis densa (Synonyms: Cheilanthes siliquosa, Cryptogramma densa, Onychium densum, Pellaea densa) -
Lace Lipfern, Lace Fern: Myriopteris gracillima (Synonym: Cheilanthes gracillima) -
American Rockbrake, American Parsley Fern: Cryptogramma acrostichoides (Synonyms: Cryptogramma crispa ssp. acrostichoides, Cryptogramma crispa var. acrostichoides)
Gold-back Fern, Gold Fern: Pentagramma triangularis ssp. triangularis (Synonym: Pityrogramma triangularis) -