S. americanus
# S. americanus

S. americanus may refer to:

* Samolus americanus, a water rose species
* Schoenoplectus americanus, a bulrush species
* Scyllarus americanus, a lobster species in the genus Scyllarus
* Siphonorhis americanus, a bird species
* Spondylus americanus, an oyster species in the genus Spondylus
* Styrax americanus, a snowbell species in the genus Styrax
* Symbion americanus, a microscopic symbiote of the American lobster in the genus Symbion
