Ophioglossum polyphyllumA.Braun ex Seub.

adder's tonguelarge adderstonguepololei

WFO wfo-0001109725 Accepted WFO 2026-06 8 photographs CC BY / CC BY-SA

Plate 1 figs. a–h · 3 observations

This species has been photographed under an open licence only 3 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Ophioglossum polyphyllum, photographed by Kevin Faccenda
fig. a Kevin Faccenda, CC BY 4.0 / 2022-01-14 / obs. 176358621

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 56 botanical countries

Regions where Ophioglossum polyphyllum is native: Angola, Azores, Botswana, Burundi, Canary Is., Cape Provinces, Cape Verde, Chad, Djibouti, DR Congo, Egypt, Ethiopia, Free State, Kenya, KwaZulu-Natal, Lesotho, Malawi, Morocco, Mozambique, Namibia, Northern Provinces, Socotra, Somalia, St.Helena, Tanzania, Tunisia, Uganda, Zambia, Zimbabwe, Afghanistan, Gulf States, Iran, Iraq, Kuwait, Oman, Palestine, Saudi Arabia, Tibet, Yemen, Bangladesh, India, Pakistan, West Himalaya, New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia, Arizona, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest, Texas, Hawaii AngolaBotswanaBurundiCape ProvincesChadDjiboutiDR CongoEgyptEthiopiaFree StateKenyaKwaZulu-NatalLesothoMalawiMoroccoMozambiqueNamibiaNorthern ProvincesSomaliaTanzaniaTunisiaUgandaZambiaZimbabweAfghanistanGulf StatesIranIraqKuwaitOmanPalestineSaudi ArabiaTibetYemenBangladeshIndiaPakistanWest HimalayaNew South WalesNorthern TerritoryQueenslandSouth AustraliaVictoriaWestern AustraliaArizonaMexico CentralMexico NortheastMexico NorthwestMexico SouthwestTexasHawaii AzoresCanary Is.Cape VerdeSt.Helena
Native distribution of Ophioglossum polyphyllum, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Angola ANG AFRICA
Azores AZO
Botswana BOT
Burundi BUR
Canary Is. CNY
Cape Provinces CPP
Cape Verde CVI
Chad CHA
Djibouti DJI
DR Congo ZAI
Egypt EGY
Ethiopia ETH
Free State OFS
Kenya KEN
KwaZulu-Natal NAT
Lesotho LES
Malawi MLW
Morocco MOR
Mozambique MOZ
Namibia NAM
Northern Provinces TVL
Socotra SOC
Somalia SOM
St.Helena STH
Tanzania TAN
Tunisia TUN
Uganda UGA
Zambia ZAM
Zimbabwe ZIM
Afghanistan AFG ASIA-TEMPERATE
Gulf States GST
Iran IRN
Iraq IRQ
Kuwait KUW
Oman OMA
Palestine PAL
Saudi Arabia SAU
Tibet CHT
Yemen YEM
New South Wales NSW AUSTRALASIA
Northern Territory NTA
Queensland QLD
South Australia SOA
Victoria VIC
Western Australia WAU
Arizona ARI NORTHERN AMERICA
Mexico Central MXC
Mexico Northeast MXE
Mexico Northwest MXN
Mexico Southwest MXS
Texas TEX
Bangladesh BAN ASIA-TROPICAL
India IND
Pakistan PAK
West Himalaya WHM
Hawaii HAW PACIFIC

Not drawn on the map: Socotra. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 118 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 3.1 °C 11.4 °C 20.7 °C
Warmest month, mean daily high 22.5 °C 27.6 °C 37.6 °C
Annual rainfall 50 mm 372 mm 1,875 mm
Rainfall in the driest quarter 0 mm 11 mm 329 mm

It is found where winters are cool but frost is light or absent. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 118 research-grade observations of Ophioglossum polyphyllum that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 10 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Ophioglossum aitchisonii (Clarke) d'Almeida
  • Ophioglossum capense Schltdl.
  • Ophioglossum capense var. regulare Schltdl.
  • Ophioglossum concinnum Brack.
  • Ophioglossum cuspidatum Milde
  • Ophioglossum regulare (Schlecht.) C.Chr.
  • Ophioglossum tapinum Peter
  • Ophioglossum vulgare var. aitchisonii C.B.Clarke
  • Ophioglossum vulgatum f. cuspidatum (Milde) Milde
  • Ophioglossum vulgatum var. polyphyllum (A.Braun ex Seub.) Milde

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.