{{Short description|Genus of ferns}} {{Automatic taxobox | image = Dennstaedtia scabra frond.jpg | image_caption = ''Dennstaedtia zeylanica'' | taxon = Dennstaedtia | authority = Bernh. (1801), nom. cons. | type_species = ''Dennstaedtia flaccida'' | type_species_authority = (J.R.Forst.) Bernh. | synonyms = *''Costaricia'' {{small|Christ (1909)}} *''Litolobium'' {{small|Newman (1854 publ. 1857)}} *''Oenotrichia'' {{small|Copel. (1929)}} *''Paradennstaedtia'' {{small|Tagawa (1952)}} *''Patania'' {{small|C.Presl (1836)}} |synonyms_ref = <ref name = powo>[https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17081340-1 ''Dennstaedtia'' Bernh.] ''Plants of the World Online''. Retrieved 22 January 2024.</ref> }}
'''''Dennstaedtia''''' is a mostly tropical and subtropical group of ferns described as a genus in 1801.<ref>Bernhardi, Johann Jakob. 1801. Journal für die Botanik 1800(2): 124</ref><ref>[http://www.tropicos.org/Name/40023778 Tropicos, ''Dennstaedtia'' Bernh.]</ref><ref>{{cite web |title=碗蕨属 Dennstaedtia{{!}}iPlant 植物智——植物物种信息系统 |url=http://www.iplant.cn/info/Dennstaedtia?t=foc |website=www.iplant.cn |access-date=30 July 2022}}</ref> '''Hayscented fern''',<ref>{{PLANTS|id=DENNS|taxon=Dennstaedtia|accessdate=13 August 2016}}</ref> or '''cup ferns''',<ref>{{Cite journal|first=Barbara |last=Joe |title=Cup Ferns (Dennstaedtia) Cultivated in California |journal=American Fern Journal |volume=55 |issue=2 |date=June 1965 |pages=58–62 |jstor=1546136|doi=10.2307/1546136}}</ref> are common names for some species in this genus. It includes 58 species native to the tropical Americas, Madagascar, southern and eastern Asia, Australia, New Guinea, and the Pacific Islands.<ref name = powo/>
Some characteristics of Dennstaedtia: "Fronds homomorphic; stipe grooved above, hairy when young... lamina triangular to oblong, many times pinnate, usually densely hairy, especially on rachis... Veins free, pinnately branching, veinlet not reaching margin, with ''hydathode'' at apex. Sori orbicular, marginal, terminal on each veinlet, separate..."<ref>{{cite web |title=碗蕨属 Dennstaedtia{{!}}iPlant 植物智——植物物种信息系统 |url=http://www.iplant.cn/info/Dennstaedtia?t=foc |website=www.iplant.cn |access-date=30 July 2022}}</ref>
The temperate North-American hay-scented fern, ''Sitobolium punctilobulum'', was formerly classified in ''Dennstaedtia'' and may have been its best-known member. It forms extensive clonal ground-cover colonies on level surfaces in the Appalachian area.<ref name = Sitobolium>[https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17222380-1 ''Sitobolium punctilobulum'' (Michx.) Desv.] ''Plants of the World Online''. Retrieved 22 January 2024.</ref>
<gallery> File:司氏碗蕨 Dennstaedtia smithii 20220716183935 02.jpg|Groove on the stipe.''D. smithii'', with a vertical white line on either side of the groove. File:司氏碗蕨 Dennstaedtia smithii 20220716183935 05.jpg|Sori and pinnules.''D. smithii'' File:司氏碗蕨 Dennstaedtia smithii 20220716183935 07.jpg|Fronds multipinnate. ''D. smithii'' File:司氏碗蕨 Dennstaedtia smithii 20220716183935 09.jpg|A fern in the Dennstaedtia can reach two meters in height such as ''D. smithii''.<ref>[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200003218 Flora of China, ''Dennstaedtia smithii'']</ref> </gallery>
==Species== [[File:Dennstaedtia christophelii holotype SRIC SR 13-004-001 A img1.tif|thumb|right|upright|''Dennstaedtia christophelii'' holotype fossil]] Species include:<ref name = powo/> {{div col}} *''D. ampla'' {{small|(Bak.) Bedd.}} *''D. anthriscifolia'' {{small|(Bory) Moore}} *''D. antillensis'' {{small|(Jenm.) C.Chr.}} *''D. appendiculata'' {{small|(Wall. ex Hook.) J.Sm.}} *''D. arborescens'' {{small|(Willd.) E.Ekman ex Maxon}} *''D. arcuata'' {{small|Maxon}} *''D. articulata'' {{small|Copel.}} *''D. auriculata'' {{small|Navarrete & B.Øllg.}} *''D. axilaris'' {{small|A.Rojas}} *''D. bipinnata'' {{small|(Cav.) Maxon}} *''D. canaliculata'' {{small|Alderw.}} *†''D. christophelii'' {{small|Pigg ''et al''}} (Ypresian, NW North America)<ref name=IJPSPiggetal>{{Cite journal|last1=Pigg |first1=K. B. |last2=DeVore |first2=M. L. |last3=Greenwood |first3=D. R. |last4=Sundue |first4=M. A. |last5=Schwartsburd |first5=P. |last6=Basinger |first6=J. F. |year=2021 |title=Fossil Dennstaedtiaceae and Hymenophyllaceae from the Early Eocene of the Pacific Northwest |journal=International Journal of Plant Sciences |volume=182 |issue=9 |pages=793–807 |doi=10.1086/715633 |s2cid=239036762 }}</ref> *''D. cicutaria'' {{small|(Sw.) T.Moore}} *''D. cornuta'' {{small|(Kaulf.) Mett.}} *''D. davallioides'' {{small|(R.Br.) Moore}} *''D. dennstaedtioides'' {{small|Copel.}} *''D. dissecta'' {{small|(Sw.) Moore}} *''D. distenta'' {{small|(Kunze) T.Moore}} *''D. elmeri'' {{small|Copel.}} *''D. flaccida'' {{small|(Forst.) Bernh.}} *''D. fusca'' {{small|Copel.}} *''D. glabrata'' {{small|(Ces.) C.Chr.}} *''D. glauca'' {{small|(Cav.) C.Chr.}} *''D. globulifera'' {{small|(Poir.) Hier.}} *''D. hirsuta'' {{small|(Sw.) Mett. ex Miq.}} *''D. hooveri'' {{small|Christ}} *''D. inermis'' {{small|(Baker) Brownlie}} *''D. macgregori'' {{small|Copel.}} *''D. macrosora'' {{small|Navarrete & B.Øllg.}} *''D. madagascariensis'' {{small|(Kunze) Tardieu}} *''D. magnifica'' {{small|Copel.}} *''D. mathewsii'' {{small|C.Chr.}} *''D. merrillii'' {{small|Copel.}} *''D. novoguineensis'' {{small|(Rosenst.) Alston}} *''D. obtusifolia'' {{small|(Willd.) T.Moore}} *''D. parksii'' {{small|Copeland ex Morton}} *''D. paucirrhiza'' {{small|Navarrete & B.Øllg.}} *''D. penicillifera'' {{small|Alderw.}} *''D. philippinensis'' {{small|Copel.}} *''D. producta'' {{small|Mett.}} *''D. remota'' {{small|(Christ) Diels}} *''D. rectangularis'' {{small|A.Rojas}} *''D. resinifera'' {{small|(BI.) Mett. ex Kuhn}} *''D. riparia'' {{small|A.Rojas}} *''D. rufidula'' {{small|C. Chr.}} *''D. samoensis'' {{small|(Brackenr.) Moore}} *''D. scandens'' {{small|(Blume) T.Moore}} *''D. shawii'' {{small|Copel.}} *''D. smithii'' {{small|(Hook.) Moore}} *''D. spinosa'' {{small|Mickel}} *''D. sprucei'' {{small|Moore}} *''D. sumatrana'' {{small|Alderw.}} *''D. terminalis'' {{small|Alderw.}} *''D. tryoniana'' {{small|Navarrete & B.Øllg.}} *''D. vagans'' {{small|(Bak.) Diels}} *''D. werckleana'' {{small|(Christ) Navarrete & B.Øllg.}} *''D. wercklei'' {{small|(H. Christ) R.M.Tryon}} *''D. wilfordii'' {{small|(T.Moore) Christ}} *''D. williamsii'' {{small|Copel.}} *''D. zeylanica'' {{small|(Sw.) Zink ex Fraser-Jenk. & Kandel}} {{div col end}}
==References== {{Reflist}}
== External links ==
{{Commons category|Dennstaedtia}} * [https://web.archive.org/web/20081017045547/http://homepages.caverock.net.nz/~bj/fern/dennstaedtia.htm Genus ''Dennstaedtia'' world species list]
{{Taxonbar|from=Q1802726}} {{Authority control}}
Category:Dennstaedtia Category:Dennstaedtiaceae Category:Fern genera