SA

Sabina

Sabinella

Sagitta

Sagittaria

Salisburia

Salvinia

SC

Sceptridium

Scheuchzeria

Schoenissa

Schoenoprasum

Schubertia

Scilla

Scolopendrium

SE

Selaginella

Sequoia

Sequoiadendron

Serpicula

SM

Smilax

SO

Solenarium

SP

Spirillus

Spirodela

ST

Staurogeton

Stellaris

Stellaster

Stratiotes

Streptopus

Strobus

Struthiopteris

Stuckenia