Ania penangiana

Ania penangiana (Hook.f.) Summerh., Bot. Mag. 161: t. 9553 1939. (syn: Ania borneensis (Rolfe) Senghas; Ania hookeriana (King & Pantl.) Tang & F.T.Wang ex Summerh.; Ania malayana (J.J.Sm.) Senghas; Ascotainia borneensis Rolfe; Ascotainia hookeriana (King & Pantl.) Ridl.; Ascotainia penangiana (Hook.f.) Ridl.; Ascotainia siamensis Rolfe ex Downie; Tainia hookeriana King & Pantl.; Tainia malayana J.J.Sm.; Tainia penangiana Hook.f.; Tainia rolfei P.F.Hunt; Tainia siamensis (Rolfe ex Downie) Seidenf. & Smitinand; Tainia steenisii J.J.Sm.; Tainia taiwaniana S.S.Ying);
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E. India to Taiwan and New Guinea: Assam, Borneo, East Himalaya, Hainan, India, Jawa, Malaya, Maluku, Nepal, New Guinea, Sumatera, Taiwan, Thailand, Vietnam as per POWO;

Assam; Borneo; East Himalaya; Hainan; India; Jawa; Malaya; Maluku; New Guinea; Sumatera; Taiwan; Thailand; Vietnam as per Catalogue of Life;

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MS Feb., 2018/05 Orchidaceae for Id : 4 posts by 3 authors. Attachments (4)
Location : Tamdil, Mizoram
Altitude : 800 – 1250 m.

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This looks like Ania penangiana (=Tainia penangiana). 

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References:
Catalogue of Life  The Plant List Ver.1.1  WCSP  IPNI  POWO  GBIF (with type specimens) Flora of China  FOC illustration  Wikispecies Wikimedia Commons  IOSPE photos  Orchid roots  The Orchids of Peninsular Malaysia and Singapore