Buddleja paniculata Wall.: 6 very high res. images.
Habitat: Wild
I think it looks different from the POWO specimen.
https://efloraofindia.com/2011/07/12/buddleja-crispa/
That is found only above 1800m. and flowers are pink and also not found in Kathmandu Valley.
Yes, it may be properly resolved with flowers.