infraspecific taxa in Geranium viscosissimum Fisch. & C. A. Mey. not recognized in Aedo, 2001, The Genus Geranium in North America II. Perennial species (Anales Jard. Bot. Madrid 59(1):3-65).
Correspondence 2 confirms that in The Jepson Manual [Ed. 2] Geranium viscosissimum Fisch. & C. A. Mey. var. incisum (Torr. & A. Gray) N. H. Holmgren is to be treated as a synonym of Geranium oreganum, and that infraspecific taxa are not to be recognized in Geranium viscosissimum.