Index - Trees
S
- Sandbar willow
- Saskatoon
- Sassafras
- Satiny willow
- Scarlet hawthorn
- Scouler willow
- Shagbark hickory
- Shellbark hickory
- Shining sumac
- Shining willow
- Shore pine
- Showy mountain-ash
- Shumard oak
- Silver buffalo-berry
- Silver maple
- Sitka alder
- Sitka mountain-ash
- Sitka spruce
- Sitka willow
- Slippery elm
- Smooth serviceberry
- Speckled alder
- Squashberry viburnum
- Staghorn sumac
- Striped maple
- Subalpine fir
- Subalpine larch
- Sugar maple
- Swamp white oak
- Sweet viburnum
- Sycamore
Latin
- Salix alaxensis (Anderson) Coville
- Salix amygdaloides Andersson
- Salix arbusculoides Andersson
- Salix bebbiana Sarg.
- Salix discolor Muhl.
- Salix eriocephala Michx.
- Salix exigua Nutt.
- Salix hookeriana Barratt
- Salix lucida ssp. lasiandra (Benth.) E. Murr.
- Salix lucida ssp. lucida
- Salix nigra Marsh.
- Salix pellita Sm.
- Salix petiolaris Sm.
- Salix prolixa Andersson
- Salix pyrifolia Andersson
- Salix scouleriana Barratt
- Salix sitchensis Sanson
- Sambucus callicarpa Greene
- Sambucus cerulea Raf.
- Sassafras albidum (Nutt.) Nees
- Shepherdia argentea Nutt.
- Sorbus americana Marsh.
- Sorbus decora (Sarg.) C.K. Schneid.
- Sorbus sitchensis M.J. Roem.