Selliguea oxyloba

Selliguea oxyloba (Wall. ex Kunze) Fraser-Jenk., Taxon. Revis. Indian Subcontinental Pteridophytes 44 2008. (Syn: Crypsinus kwangtungensis (Ching) Tag.; Crypsinus oxylobus (Wall. ex Kunze) Sledge; Crypsinus pingpienensis (Ching) Nakaike; Crypsinus suboxylobus (Ching) Nakaike; Phymatodes kwangtungensis Ching; Phymatodes oxyloba (Wall. ex Kunze) Ching; Phymatodes oxyloba C. Presl; Phymatopsis kwangtungensis (Ching) Ching; Phymatopsis oxyloba (Wall. ex Kunze) Ching; Phymatopsis oxyloba var. thunbergii (C. B. Cl.) S. R. Ghosh; Phymatopsis pingpienensis Ching; Phymatopsis suboxyloba Ching; Phymatopsis trifida (D. Don) J. Sm.; Phymatopteris kwangtungensis (Ching) Pic. Serm.; Phymatopteris oxyloba (Wall. ex Kunze) Pic. Serm.; Phymatopteris pingpienensis (Ching) Pic. Serm.; Phymatopteris suboxylobus (Ching) Pic. Serm.; Pleopeltis hastata (Thunb.) Bedd. (ambiguous synonym); Pleopeltis oxyloba (Wall. ex Kunze) Bedd. (ambiguous synonym); Pleopeltis trifida (D. Don) Bedd.; Pleuridium oxylobum (Wall. ex Kunze) J. Sm.; Polypodium hastatum var. oxylobum (Wall. ex Kunze) C. B. Cl.; Polypodium kwangtungense (Ching) Ching; Polypodium longipes Ching (ambiguous synonym); Polypodium oxylobum Wall.; Polypodium oxylobum Wall. ex Kunze; Polypodium trifidum D. Don (ambiguous synonym); Polypodium trifidum var. catadromum Christ; Selliguea oxyloba (Wall. ex Kunze) S. Linds.);
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Himalaya to S. China and Indo-China: Assam, Cambodia, China South-Central, China Southeast, East Himalaya, Laos, Myanmar, Nepal, Thailand, Vietnam, West Himalaya as per POWO;
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China (Guangdong, Guangxi, Sichuan, Yunnan), India (N-India, Himachal Pradesh, Uttarakhand, Sikkim, Darjeeling), Myanmar [Burma], Nepal, Thailand, Vietnam, ?Laos, Cambodia as per Catalogue of Life;
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SK1940 23 May 2019 : 11 posts by 2 authors. Attachments (5)- around 900 kb each.

Some fern ?

Yes …! Did not find image in net and books !

It is Drynaria quercifolia

It seems to be Selliguea oxyloba (Wall. ex Kunze) Fraser-Jenk.

excerpts from his book.
Attachments (1) – 2 Mb.

Pl. check Selliguea oxyloba as per

Yes, it is S. oxyloba – a very common and well known, easy species to recognise. You will see my discussion about its separation from S. hastata (not in Nepal) in my book, Taxonomic Revision of Three Hundred Indian Subcontinental Pteridophytes (2008).  I hope you have got the main recent literature.  No need for further website refs as far as I’m concerned – I presented the relevant books to the National Herbarium, which you can consult there.
When you contact Nepal’s National Herbarium – as you should be doing – you can ask my student, Dr. Dhan Raj Kandel, for fern-identification, to ensure you do not make any mistaken identifications in your photo posting. When did you last visit there?  All the ferns are correctly identified and organised in order there and you need to refer to it to check your tentative identifications and to learn the species

Incidentally in that RBGE Thai website, someone not so familiar with the species has muddled it up and added a photo of Pichisermollodes stewartii as well – this is why your photo is quite different from theirs, which you may have been wondering about.

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  Tropicos  IPNI  GBIF (with specimens) Flora of China  FOC illustration