Contributed by Scott G. Ward and Alan S. Weakley
A genus of about 400 species, trees, shrubs, and subshrubs, mostly north temperate and boreal.
ID notes: Most of our willow species (but not all) have lanceolate leaves that are finely serrate, and with prominent stipules at least on rapidly growing shoots.
Ref: Argus (1986); Argus (1997); Argus (2010) In Flora of North America Editorial Committee (2010); Belyaeva (2009); Chen et al. (2010); Dorn (1995); Dorn (1998); Marchenko & Kuzovkina (2022). Show full citations.