Thelypteris unita

Thelypteris unita (L.) C.V.Morton, Amer. Fern J. 49: 113 (1959) as per POWO;
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Sphaerostephanos unitus (L.) Holttum, J. S. African Bot. 40(2): 165–166 1974. (syn: Aspidium canescens (Presl) Kunze (ambiguous synonym); Aspidium cucullatum Bl.; Aspidium cucullatum var. rigidum Bl.; Aspidium haenkeanum (Presl) Fourn.; Aspidium leuconeuron (Fée) Kuhn; Aspidium unitum (L.) Sw. (ambiguous synonym); Cyclosorus haenkeanus (Presl) Ching; Cyclosorus unitus (L.) Ching; Dryopteris cucullata (Bl.) Christ; Dryopteris haenkeana (Presl) O.Kuntze; Dryopteris leuconeura (Fée) Nakai; Dryopteris unita (L.) O.Kuntze (ambiguous synonym); Nephrodium canescens C.Presl (ambiguous synonym); Nephrodium cucullatum (Bl.) Bak.; Nephrodium haenkeanum C.Presl (ambiguous synonym); Nephrodium insculptum Desv.; Nephrodium leuconeuron Fée; Nephrodium microcarpon Fée; Nephrodium plectochlaena Fée; Nephrodium serratum (Cav.) Presl (ambiguous synonym); Nephrodium unitum (L.) Bory; Polypodium acuminatum Houtt. (ambiguous synonym); Polypodium caudigerum Wall.; Polypodium dichotomum Panz. (ambiguous synonym); Polypodium unitum L. (ambiguous synonym); Polystichum unitum (L.) Gaud.; Pteris polypodioides Poir.; Sphaerostephanos cucullatus (Bl.) S.M.Almeida & M.R.Almeida; Tectaria serrata Cav.; Thelypteris haenkeana (Presl) Reed; Thelypteris leuconeuron (Fée) Schelpe; Thelypteris unita (L.) Mort. (ambiguous synonym));
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N. Angola, Tanzania to Pacific: Angola, Assam, Borneo, Caroline Is., Comoros, Fiji, India, Jawa, Lesser Sunda Is., Madagascar, Malaya, Maluku, Marianas, Mauritius, Myanmar, New Guinea, Northern Territory, Philippines, Queensland, Rodrigues, Réunion, Samoa, Seychelles, Solomon Is., Sri Lanka, Sulawesi, Sumatera, Tanzania, Thailand, Tonga, Tubuai Is., Vanuatu, Vietnam as per POWO;

Australia (N-Northern Territory, SE-Queensland), Tanzania, Madagascar, Seychelles (Mah, Silhouette Isl., Long Isl.), Mauritius, La Runion, Rodrigues
Isl., Comoros (Mayotte), Sri Lanka, India (Bihar, Karnataka, Kerala, Madhya Pradesh, Tamil Nadu, Tripura), Myanmar [Burma], peninsular Thailand, peninsular Malaysia, Singapore (I), N-Vietnam, Sumatra, Java, SW-Sulawesi, Lesser Sunda Isl. (Lombok, Sumba, Flores, Timor, Wetar, Bali, Sumbawa, Alor), Philippines, Palawan, W-New Guinea, Southern Marianas (Guam, Rota Isl., Saipan, Tinian), Northern Marianas (Pagan, Agrigan, Pagan, Alamagan), Fiji (Viti Levu, Vanua Levu, Ovalau, Taveuni), Rotuma Isl., Palau Isl. (Babeldaob, Koror), Micronesia (Yap, Pohnpei, Kosrae), Tonga (Kao, Vava’u, ‘Eua), Western Samoa (Upolu), American Samoa (Tutuila), Austral Isl. (Tubuai) as per Catalogue of Life;
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Sphaerostephanos unitus (L.) Holtt. SN27420a : 2 posts by 2 authors. Attachments (1) – 4 mb.
Sphaerostephanos unitus (L.) Holtt. Wild terrestrial fern from Western Ghats Tamilnadu

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  Tropicos  IPNI  GBIF (High resolution specimens) POWO  India Biodiversity Portal  Smithsonian Institution  SEINet Portal Network  Flora Malesiana  Pteridophyte Collections Consortium