On further checking, I found a
specimen of Conyza stricta var. stricta from Nepal at
POWO to be similar looking.
As both Conyza stricta var. pinnatifida and Conyza stricta var. stricta are reported from Nepal, we have to find out the difference between the two, before taking any decision.
Finally, I could find the difference between the two from
Flora of China as below:
1a. Lower leaf margin coarsely serrate, rarely entire; upper leaves gradually reduced ...... var. stricta
1b. Lower leaf margin deeply repand-pinnatilobate, lobes 2-paired, oblong-oblanceolate or cuneate, margin entire, terminal lobe larger; upper leaves and those on branches 3-fid ...... var. pinnatifida
So we can take it as Conyza stricta var. pinnatifida