Zingiberaceae?? -070610-PKA1 – efloraofindia | Google Groups: 4 images.
ID requested for this Zingiberaceae sp ? from Mizoram.
Looks like some Hedychium sp.

Date/Time: 8th Nov./ 10:15AM
Location: Vaipuanpho, Mizoram
Habitat: Wild
Plant Habit: Herb
Height: Approx. 1m, stem bowing downwards
Leaves alternate, sessile, 
with long lance-shaped blade, midrib broad and prominent

Yes Hedychium for sure!!

May be the Hedychium forrestii
Prashant sir if you have the flower photo please attach, then it is easy to id the plant.

The images may be Hedychium sp. Flowers are needed for corect identity.