Bomarea species- Darjeeling


Images by Nidhan Singh, Identified by Surajit Koley (Inserted by J.M.Garg)
Ornamental for id from Darjeeling:: NS Sept 09 : 8 posts by 3 authors. Attachments (4).  
This twining ornamental herb was shot from LBG, Darjeeling..
Please suggest id..
Thanks ... for this very useful link..
I now know that this is a Bomarea sp.
It was the first time I saw these flowers, that too in ephotographs! A curious search gave me a hint and I pasted the link!
I don't know what is the species id or if there is any other similar looking genus..... perhaps the most popular cultivars belong to B. multiflora (L.f.) Mirb., which may be a weed as well!

Perhaps we can identify it upto B. caldasiana Herb. level, thereafter it diverges -
Since we (?) do not have KEY to spp, following lit. may help -