Saxifraga | Pimpinella saxifraga | Saxifraga mertensiana | A larval web in an inflorescence of ''Pimpinella saxifraga |
A number of plant, animal and fungal species have been named to his honour, e.g. Saxifraga nathorstii (Dusén) Hayek (East Greenland saxifrage) and a suite of fossil plant species, Williamsonia nathorstii Carruthers (a fossil dragonfly) and Laestadites nathorstii Mesch. (a fossil fungus).