Aristolochia griffithii

Images by Usha Ganguli-Lachungpa (Id by Shrikant Ingalhalikar & Paramjit Singh) (Inserted by J.M.Garg) (For more photos & complete details, click on the links)

Aristolochia from Sikkim for id: 4 posts by 3 authors. Attachments (1)
Would be grateful for identification of this high altitude, large flowered, wild Aristolochia which looks pale to be griffithii, but does not match with pictures I could locate on the Net
Location: Lachung, North Sikkim.  Does not attract butterflies, did not grow in Gangtok.

Aristolochia saccata ??
I feel this is very much A. griffithii. I have seen this plant at Eaglenest, Arunachal Pradesh.
... of BSI has confirmed that it is indeed Aristolochia griffithii.