Ophioglossum petiolatum

Ophioglossum petiolatum Hook., Exot. Fl. 1: 56, pl. 56 1823. (syn: Ophioglossum elongatum A.Cunn. ; Ophioglossum floridanum E.P.St.John ; Ophioglossum floridanum f. favosum E.P.St.John ; Ophioglossum floridanum f. reticulosum E.P.St.John ; Ophioglossum litorale Makino ; Ophioglossum moluccanum Schltdl. ; Ophioglossum moluccanum f. complicatum Miq. ; Ophioglossum reticulatum f. complicatum (Miq.) Wieff. ; Ophioglossum vulgatum var. australasiaticum Luerss.);

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Tropical & Subtropical Asia to Pacific, S. Mexico: Assam, Bangladesh, Bismarck Archipelago, Borneo, Caroline Is., Chatham Is., China South-Central, China Southeast, Christmas I., East Himalaya, Fiji, Hainan, Hawaii, India, Japan, Jawa, Kermadec Is., Lesser Sunda Is., Malaya, Maluku, Mexico Southeast, Mexico Southwest, Myanmar, Nansei-shoto, Nepal, New Caledonia, New Guinea, New South Wales, New Zealand North, New Zealand South, Niue, Norfolk Is., Northern Territory, Ogasawara-shoto, Pakistan, Philippines, Queensland, Samoa, Society Is., Solomon Is., Sri Lanka, Sumatera, Taiwan, Thailand, Tibet, Tubuai Is., Vanuatu, Victoria, Vietnam, West Himalaya, Western Australia as per POWO;
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SK538 04 JUN-2017:ID : 8 posts by 3 authors. Attachments (3)

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This is Ophioglossum petiolatum. It has a curious habit of invading pots of plants in gardens, and is common on rooftop gardens in Kathmandu, for example – and I hear the same happens elsewhere.  It blows in the wind (I mean the spores do!) and establishes itself.  Nice little thing. Like most or nearly all Ophioglossum species it propagates by root-buds and forms colonies where it has spread to.

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Thank you. Nepali Name : जिब्रे साग Jibre Saag 

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Ophioglossum petiolatum Hook. : 4 posts by 1 author. 4 images- 7 mb each.

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  Tropicos  IPNI  Flora of China FOC illustration  Flora of North America  India Biodiversity Portal