Alpinia roxburghii

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Alpinia roxburghii Sweet, Hort. Brit. 390 1826. (Syn: Alpinia blepharocalyx K.Schum.; Alpinia blepharocalyx var. glabrior (Hand.-Mazz.) T.L.Wu; Alpinia bracteata Roxb. [Illegitimate]; Languas blepharocalyx (K.Schum.) Hand.-Mazz.; Languas blepharocalyx var. glabrior Hand.-Mazz.);
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E. Nepal to S. China and Peninsula Malaysia: Assam, Bangladesh, China South-Central, China Southeast, East Himalaya, India, Laos, Malaya, Myanmar, Nepal, Thailand, Vietnam as per POWO;
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Assam; Bangladesh; China South-Central; China Southeast; East Himalaya; India; Laos; Malaya; Myanmar; Nepal; Thailand; Vietnam as per Catalogue of Life;
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MS MAy,2018/01 Alpinia sp. for ID : 3 posts by 2 authors. Attachments (2)
Location : Tamdil, Mizoram
Date : 30-04-2018
Habit : Herb
Habitat : Wild

Alpinia blepharocalyx

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IDENTITY OF ALPINIA SPECIES. : 7 posts by 3 authors. Attachments (4)
Attaching three collages of an Alpinia species. It is not Alpinia zerumbet (a collage is attached as ref). Can it be Alpinia calcarata ??

Looks different from images at Alpinia calcarata 

Alpinia blepharocalyx

So … opinion is its Alpinia blepharocalyx. it would be helpful if there was a quick key