Diospyros stricta Roxb., Fl. Ind. ed. 1832 2: 539 1832. (syn: Diospyros orixensis Wight ex Hiern, nom. illeg.);
Bangladesh as per POWO;

MS, Feb., 2021/02 Diospyros sp. (stricta) ? for id
3 images.
Location : Hmunpui, Mizoram

Date : 23-07-2015
Habit : Medium sized tree
Habitat : Wild

What are the keys?

May be as per GBIF– specimen


But Diospyros stricta is not listed in the book.
Keys are based mainly on the corolla and calyx ?

Who has suggested the id as Diospyros stricta ?

Searching in GBIF for other species (with specimens from India) did not yield better results as per 
I think flowering images may be of help.

My one specimen like this tree was identified as Diospyros stricta by Botanical Survey of India in 2003


References: POWO  Catalogue of Life  The Plant List Ver.1.1  WCSP  IPNI  GBIF– specimen (High resolution specimens) IBIS Flora (FBI)