This certainly appears to be a Gnaphalium. Enumeration of the Flowering plants of Nepal lists 3 species: G.affine, G.hypoleucum & G.polycaulon -
there seems confusion over nomenclature.
Flora of Kathmandu Valley gives 2 species: G.hypoleucum & G.luteo-album. The latter species is recorded from 1300-2300m on open, dry slopes;
known as 'Kairo jhar'. Described as having golden-yellow heads in dense corymbs.
Flowers of Himalaya describe G.affine & G.hypoleucum; surprisingly they have a photo of the latter species (not close-up and with flower-heads most
people would pay little attention to) but only a line drawing of the brightly coloured G.affine - which is eye-catching. A photo of this appears in the Supplement
to Flowers of the Himalaya but fewer people have this.
Of these, it seems to fit G.affine (syn. G.luteo-album var. multiceps) which FoH says a very common weed in cultivated areas @ 1200-3000m from Pakistan to Bhutan & sub-tropical Asia. Flower-heads globular, bright glistening yellow. AND, rather surprisingly, seems to be NEW to eFI.
Beware of the ALARMING number of synonyms some of the Gnaphaliums have. G.polycaulon is described as a pantropic weed.