Beautiful, but not known to me.

Found this one growing under a bush in Manas national park in the northeast of India.

 

Could it be some type of pitcher flower

http://images.google.com.au/images?hl=en&q=pitcher+plant&btnG=Search+Images&gbv=2

Liz

 

Try Aristolochia cathcartii.
http://www.cambridge2000.com/gallery/html/P51211614.html

 

Michael, Thank you for the link.
It certainly looks like Aristolochia cathcartii Hook. f.
I wonder if it is common to find them in northeast India, because in 20 years of my wanderings there, I had never seen one before.

 

I don't know anything much about the species (I recognised your photo as an Aristolochia species, did a google image search, and found a photo closely resembling yours as the third hit). Looking up, Joseph Dalton Hooker ('Hook. f.') discovered it in the Himalaya, but I don't have any more information than that.
http://www.ipni.org/ipni/idPlantNameSearch.do?id=92813-1&Ffind_wholeName%3DAristolochia%2Bcathcartii

 

They are widely grown in Assam, Arunachal and Bhutan thick forests.EArlier they was big and people never travelle near them.They live on sucking insect.They give nice hney like smell and insect peeps into it and then the lid get closed.This is how they live.The only kind of plant in the world still eisting.