Schlumbergera
Schlumbergera bridgesii -
Reported to contain unspecified alkaloids.
Schlumbergera runcata -
Reported to contain unspecified alkaloids.
Selenicereus
Selenicereus pteranthus -
Contains: hordenine.
Solisia
Selenicereus pectinata -
Contains: hordenine, N-methyltyramine.
Stenocereus
A generally large tree-like, columnar Cactus reported to contain mescaline and sterols. Native from the Baha desert to Haiti depending on the species. Protect from frost, not cold tolerant.
Stenocereus eruca -
Contains: mescaline, 3-4-dimethoxyphenethylamine (.01%), 4-hydroxy-3-5-dimethoxyphenethylamine (.01%).
Stenocereus fricii -
Reported to contain unspecified alkaloids.
Stenocereus quercetaroensis -
Reported to contain unspecified alkaloids.
Stenocereus treleasei -
Contains: mescaline, 3-4-dimethoxyphenethylamine (.01%), 4-hydroxy-3-5-dimethoxyphenethylamine (.01%).
Stetsonia
Strombocactus
Sulcorebutia
Sulcorebutia kruegeri -
Reported to contain unspecified alkaloids.