Salvelinus namaycush © U.S. Fish and Wildlife Service
Salvinia molesta © Clematis
Salvinia natans © Le Loup Gris
Sander lucioperca © Piet Spaans
Saururus cernuus © R.H. Mohlenbrock
Schizoporella japonica © Kirsty Robertson
Sciurus carolinensis © Diliff
Robinia pseudoacacia © Elodie Russier-Decoster
Robinia pseudoacacia © Elodie Russier-Decoster
Robinia pseudoacacia © Hans
Rorippa austriaca © 4028mdk09
Rudbeckia hirta © Nicholas A. Tonelli
