Impatiens trilobata Colebr., Exot. Fl. 2: t. 141 1825. (syn: Impatiens flavida Hook.f. & Thomson);
India (W-Bengal, Assam, Arunachal Pradesh, Meghalaya), Sikkim, Bangladesh,
Myanmar [Burma], Darjeeling as per Catalogue of Life;
Fwd: Impatiens sp for identification. Meghalaya. 24.6.17 : 3 posts by 2 authors. Attachments (3)
I don’t see all details, but I suppose this is I. trilobata.
Fwd: Supplement photos for Impatiens sp for identification. Meghalaya. 24.6.17 : 2 posts by 2 authors. Attachments (3)
I found several useful details, particularly in first of additional pictures: leaves at least partially opposite, peduncles less or more horizontal, some bristles on the margin of leaf blade.
I am rather convinced now that it is I. trilobata.