Impatiens species- Sikkim

Impatiens 2 from Sikkim for identifcation:: NS Sept 03 : 3 posts by 2 authors. Attachments (4). 
Please provide your valuable inputs regarding id of this Impatiens shot en route Pelling from Kalimpong..
I tryed my best, but was unable to identify this species.
I checked it with Flora of Bhutan, where good illustrations of flowers were published for some species, with Flora of India and found nothing similar enough.
Maybe someone working in Sikkim could be able to resolve this mystery?
Also some more information about plant could be helpful.
Thanks for the efforts Sir.. I may request ... to share some more views of the same..
Here are two pics of the same received from ... Attachments (2).