Hemiorchis pantlingii

Hemiorchis pantlingii King, Ann. Roy. Bot. Gard. (Calcutta) 5: 163 1894. ; 

Plant Id from Bangladesh SM019 : 10 posts by 4 authors. Attachments (1). 
Habit: May be rhizomotous herb (No visible plant body except the flower)
Habitat: Forest floor
Location: Gazipur
Flowering : May
I think this is Amomum longipes
Beautiful post ... you are showing a large number of unique taxa.. thanks..
Thanks ... I am exploring flora since 2000 (when I was admitted as a BSc student in Botany).
Keep exploring.. best of luck, you got a good collection and now a great platform too..
Check Genus Hemiorchis and sp. pantlingii probably
Family Zingiberaceae
It may be Hemiorchis sp. of Zingiberaceae.
Hemiorchis pantlingii

Conservation assessment of two rare gingers (Zingiberaceae) from Dampa Tiger Reserve : 2 posts by 2 authors. Attachments (1) - 067 2018 G spathulata H pantlingii Cons Ass JOTT.pdf- 3 MB.
Please find one of our recent articles attached with the mail. Hope we can find more populations of such interesting plants in India.
Kumar, P. & P. Singh (2018). Conservation assessment of two rare gingers (Zingiberaceae) from Dampa Tiger Reserve, Mizoram, India. Journal of Threatened Taxa 10(5): 11599–11605; http://doi.org/10.11609/jott.3797.10.5.11599-11605