Canthium parvifolium Roxb., Fl. Ind. 2: 170 (1824) (syn: Plectronia parvifolia (Roxb.) K.Schum. ; Plectronia parvifolia (Roxb.) Benth. & Hook.f. ex Kurz ; Webera adunca W.Hunter);
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India to Indo-China: Bangladesh, Cambodia, India, Vietnam as per POWO;
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Regarding the Identification of the Species collected from Mayurbhanja Odisha: 6 high res. images.
Can it be some Garcinia species? Pl. check:
https://efloraofindia.com/2011/03/02/garcinia/
Leaves are not opposite so it is not Garcinia. It looks a bit like Flacourtia indica but I am not sure.
I think looks different as per images at
https://efloraofindia.com/2011/03/01/flacourtia-indica/
I think also does not match with any other species as per images at
https://efloraofindia.com/2011/03/01/flacourtia/
Rubiaceae ??? Cerscoides ??? not sure without flowers
It looks different from images at
https://efloraofindia.com/2011/02/14/ceriscoides-turgida/
Pl. check with images at
https://efloraofindia.com/2011/04/01/tamilnadia-uliginosa/
https://www.zhiwutong.com/dan_tu/94/75783.htm
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References:
POWO Catalogue of Life GBIF specimen (High resolution specimens) Annotated checklist of Flowering plants of Nepal Flora of Eastern Ghats India Biodiversity Portal