Families (As per The Plant List)

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

S

SALVINIACEAE - 4 ( Azolla pinnata, Azolla pinnata subsp. asiatica, Salvinia adnata, Salvinia cucullata)

SCHIZAEACEAE - 2 ( Schizaea dichotoma, Schizaea digitata)

SELAGINELLACEAE - 31 ( Selaginella braunii, Selaginella bryopteris, Selaginella cataractarum, Selaginella chrysocaulos, Selaginella chrysorrhizos, Selaginella ciliaris, Selaginella coonoriana, Selaginella crassipes, Selaginella delicatula, Selaginella emodi, Selaginella fulcrata, Selaginella ganguliana, Selaginella inaequalifolia, Selaginella intermedia, Selaginella involvens, Selaginella kraussiana, Selaginella microdendron, Selaginella miniatospora, Selaginella monospora, Selaginella ornithopodioides, Selaginella plana, Selaginella proniflora, Selaginella radicata, Selaginella repanda, Selaginella reticulata, Selaginella tenera, Selaginella uncinata, Selaginella vaginata, Selaginella vogelii, Selaginella wightii, Selaginella willdenowii)