Piper suipigua ?

Same plant :
https://groups.google.com/g/indiantreepix/c/XJ

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This species looks very close to the P. walichii Miq.  in its  young inflorescence. Sir is it possible to get the fruits.

You have already the plant collected with bright yellow male spike. Please see how it is related to the called Chabo in nepali.

But the habit and leaves also indicate near to P. hamiltonii C. DC.
Please try to collect the fruiting spike

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I guess the fruit shape and leaf venetian matches with Piper suipigua Buch.-Ham. ex D.Don !

http://plantillustrations.org/1&lay_out=0&uhd=0