Willow Identification Key: Leaves not bitter, hairy, green beneath

Leaves not bitter, hairy or downy beneath at least when young, green beneath (although may appear whitish due to hairs); buds not yellow

Leaves persistently downy beneath, tip short and twisted

Leaves persistently downy beneath, tip short and twisted

Leaves somewhat hairy beneath, tip long and not twisted

Leaves somewhat hairy beneath when young, but becoming almost hairless at maturity, tip long and not twisted; catkins upright

Leaf tips of S. calodendron (long and not twisted) and S. reichardtii (short and twisted)
Leaf tips of S. calodendron (long and not twisted) and S. reichardtii (short and twisted)
Leaf tips of S. cinerea var oleofolia (short and twisted), S. Caprea (short and twisted) and S. calodendron (long and not twisted)
Leaf tips of S. cinerea var oleofolia (short and twisted), S. Caprea (short and twisted) and S. calodendron (long and not twisted)
Leaf tips of S. calodendron (long and not twisted) and S. reichardtii (short and twisted)
Leaf tips of S. calodendron (long and not twisted) and S. reichardtii (short and twisted)
Leaf tips of S. cinerea var oleofolia, S. Caprea and S. reichardtii (all short and twisted) and S. calodendron PN 306 and PN 325 (long and not twisted)
Leaf tips of S. cinerea var oleofolia, S. Caprea and S. reichardtii (all short and twisted) and S. calodendron PN 306 and PN 325 (long and not twisted)
Not hairy below vs. hairy below (not the difference here may not be as extreme as that shown in this photo)
Not hairy below vs. hairy below (not the difference here may not be as extreme as that shown in this photo)