Dennstaedtia Bernh.:
Argentina (South America)
Belize (Mesoamerica)
Bolivia (South America)
Brazil (South America)
Colombia (South America)
Costa Rica (Mesoamerica)
Ecuador (South America)
El Salvador (Mesoamerica)
French Guiana (South America)
Guatemala (Mesoamerica)
Guyana (South America)
Honduras (Mesoamerica)
Japan (Asia)
Mexico (Mesoamerica)
Madagascar (Africa & Madagascar)
Nicaragua (Mesoamerica)
Panama (Mesoamerica)
Peru (South America)
Malaysia (Asia)
Paraguay (South America)
Suriname (South America)
Uruguay (South America)
Venezuela (South America)
Caribbean (Caribbean)
United States (North America)

Dennstaedtia is a primarily tropical genus of ferns with some 59 species (some say 80 species). Its best-known member is probably the temperate North-American hay-scented fern (pictured in the taxobox), which forms extensive clonal ground-cover colonies on level surfaces in the Appalachian area.

Full list of Dennstaedtia species:

Dennstaedtia ampla (Bak.) Bedd. Dennstaedtia anthriscifolia (Bory) Moore Dennstaedtia antillensis (Jenm.) C.Chr. Dennstaedtia appendiculata (Wall. ex Hook.) Dennstaedtia arborescens (Willd.) E.Ekman ex Maxon Dennstaedtia bipinnata (Cav.) Maxon Dennstaedtia canaliculata Alderw. Dennstaedtia cicutaria (Sw.) T.Moore Dennstaedtia coronata (Sod.) C.Chr. Dennstaedtia cuneata (J.Sm.) Moore Dennstaedtia d'orbignyana Kuhn Dennstaedtia davallioides (R.Br.) Moore Dennstaedtia delicata (F.v.Muell.) Alston Dennstaedtia dennstaedtioides Copel. Dennstaedtia deparioides Rosenst. Dennstaedtia dissecta (Sw.) Moore Dennstaedtia distenta (Kunze) T.Moore Dennstaedtia elmeri Copel. Dennstaedtia flaccida (Forst.) Bernh. Dennstaedtia fluminensis (Fée) C.Chr. Dennstaedtia fusca Copel. Dennstaedtia glabrata (Ces.) C.Chr. Dennstaedtia glauca (Cav.) C.Chr. Dennstaedtia globulifera (Poir.) Hier. Dennstaedtia hirsuta (Sw.) Mett. ex Miq. Dennstaedtia hooveri Christ Dennstaedtia incisa (Fée) Kuhn Dennstaedtia inermis (Baker) Brownlie Dennstaedtia kalbreyeri Maxon Dennstaedtia leptophylla Hayata

Dennstaedtia lindsayiformis (Fée) C.Chr. Dennstaedtia macgregori Copel. Dennstaedtia madagascariensis (Kunze) Tardieu Dennstaedtia magnifica Copel. Dennstaedtia melanostipos Ching Dennstaedtia merrillii Copel. Dennstaedtia munchii Christ Dennstaedtia novoguineensis (Rosenst.) Alston Dennstaedtia obtusifolia (Willd.) T.Moore Dennstaedtia parksii Copeland ex Morton Dennstaedtia penicillifera Alderw. Dennstaedtia philippinensis Copel. Dennstaedtia producta Mett. Dennstaedtia punctilobula (Michx.) Moore Dennstaedtia remota (Christ) Diels Dennstaedtia resinifera (BI.) Mett. ex Kuhn Dennstaedtia rufidula C. Chr. Dennstaedtia samoensis (Brackenr.) Moore Dennstaedtia scabra (Wall. ex Hook.) Moore Dennstaedtia shawii Copel. Dennstaedtia smithii (Hook.) Moore Dennstaedtia spinosa Mickel Dennstaedtia sprucei Moore Dennstaedtia sumatrana Alderw. Dennstaedtia terminalis Alderw. Dennstaedtia tripinnatifida Copel. Dennstaedtia vagans (Bak.) Diels Dennstaedtia wercklei (H. Christ) R.M.Tryon Dennstaedtia williamsii Copel.