Piper sylvaticum

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Piper sylvaticum Roxb., Fl. Ind., ed. 1820 1: 158–159 1820. (syn: Chavica sylvatica (Roxb.) Miq.; Piper dekkoanum C. DC.; Piper malmoris Wall.);
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Tibet, China (Yunnan), Laos, Bangladesh, India, Myanmar [Burma] (Taninthayi), Bhutan, Sikkim as per Catalogue of Life;
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Climbing shrub, stems deeply striate when dry. Leaves on creeping stems broadly ovate-cordate; those on aerial branches membranous, ovate to lanceolate, 7-13 x 3-7cm, acuminate, base cuneate or rounded, symmetic or slightly oblique, 5-veined at base, with 2 lateral veins arising 1.5-2cm above base, main veins densely puberulous, not very prominent, minor veins reticulate and gland-dotted beneath; petiloes 1-2.5cm; stipules narrow, inconspicuous, adante to petiole; axillary buds large 10-14mm. Male spikes and anthers as in P.mullesua, on peduncles 4-10mm. Female spikes cylindric, on short peduncle 4-8(-12)mm, stigmas 3-4. Fruiting spikes 15-30 x 7-10mm; drupes globose, 3mm, densely arranged.

Fl. March-May
Subtropical and terai forests.
(Attributions- A.C.J Grierson & D.G Long. Flora of Bhutan. Published by RBGE. 1984 from India Biodiversity Portal)
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MS May, 2018/09 Piper sp. for ID : 4 posts by 2 authors. Attachments (3)
Location : Tamdil, Mizoram

Date : 08-05-2018
Habit : Climber
Habitat : Wild

Its male plant Piper sylvaticum Roxb. Shows high variations place to place in its leaf and infl. size.

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SK2014 20 June 2019 : 11 posts by 2 authors. 6 correct images.
Location: Suryabinayak, Bhaktapur
Date: 7 June 2019
Elevation: 1508 m.
Habit : Wild 
Which Piper ??

Please ignore 1st image.

Piper suipigua Buch.-Ham. ex D.Don ??
Its probably a male plant of P. sylvaticum
I am afraid it does not look like matching. And on the other hand I did not find it listed in Nepal.
To me also appears close as per Piper sylvaticum
… says that its male plant Piper sylvaticum Roxb. Shows high variations place to place in its leaf and infl. size.
Could you please look for it if it is listed in Nepal as you did last time from the Research gate for other sp.
Search for Piper sylvaticum + Nepal in net.
The female plant with fruiting spike will confirm its identity.
I have seen P. sylvaticum in north east as well in North Bengal. Also reported from China. So chances of occurence is very high. Because of wrong identity many of the Piper species recorded in different name.

Yes, more closer to specimens of Piper suipigua in GBIF rather than those of Piper sylvaticum as per GBIF. However, … can only confirm.

Sir this is 100% male plant of P. sylvaticum

Thank you for confirming the ID

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SK 3903 01 December 2023: 7 very high res. images.
Location: Taplejung, East Nepal
Habit : Wild

Piper amalago L. ?

ID may be correct if it would be a new sp. for Nepal. So far not listed for Nepal.

To me appears close to either
https://efloraofindia.com/2020/06/11/piper-peepuloides/
https://efloraofindia.com/2018/05/24/piper-sylvaticum/

Shall we wait for the opinion from Gajurel Sir !

Yes. He is the final word.

What is the suggestion from your side out of the two or some other closer species?

sylvaticum or amalago ??

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References:
Catalogue of Life  The Plant List Ver.1.1  Tropicos  IPNI  Flora of China  India Biodiversity Portal  florawww.eeb.uconn.edu  Flora Fauna Web  Bhutan Biodiversity Portal