This is definitely Arisaema tortuosum - quite distinctive fruiting heads 
and foliage.  May I recommend on future occasions you remove a few seeds 
from the reddish/orange pulp and photograph these close-up.  They are also 
distinctive, quite large for the genus and mottled.  The seeds can then be 
placed in the soil near to the plant - you will have acted as a bird or 
other creature who would have eaten the seed and as it passed through its 
digestive system this pulp which contain germination inhibiting chemicals 
is removed and as the animal excretes the seed (often dispersed some 
distance away) it may drop somewhere where a fresh plant can grow.

Whilst the species is distinctive it exhibits considerable variation with a 
number of varieties recognised.  'Enumeration of the Flowering Plants of 
Nepal' says both var. tortuosum and var. curvatum are found - the former 
variety being widespread in the country from 1300-2900m. 

Collet in 'Flora Simlensis' separated Arisaema helliborifolium (Arisaema 
tortuosum var. helliborifolium) and Arisaema curvatum.  He said that 
A.helliborifolium is the first to appear (the plants die down completely 
over winter) sometimes coming into flower before the monsoon.

'Flowers of the Himalaya' give a range of Kashmir to SW China in forests, 
shrubberies and on open slopes.   It is often the tallest of Arisaemas at 
times exceeding 1.5m.

'Araceae' for Flora of Pakistan gives a distribution of temperate and 
subtropical Himalaya, Baluchistan, Western China & North Myanamar.

*Certainly a robust, prominent, large species found at the lowest levels of 
any Arisaema in the Himalaya.*

On Wednesday, November 9, 2016 at 3:21:57 PM UTC, Saroj Kumar Kasaju wrote:

> Dear Members,
>
> Location: Pilot Baba Ashram, Bhaktapur , Nepal
> Altitude:  5500 ft.
> Date: 26 September 2016
>
> *Arisaema tortuosum (Wall.) Schott (accepted name) ??*
>
> Thank you.
>
> Saroj Kasaju
>

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