Sagina, Genus
Sagittaria, Genus
Salicaceae, Family
Salicornia, Genus
Salix, Genus
Salsola, Genus
Salvia, Genus
Salvinia, Genus
Salviniaceae, Family
Sambucus, Genus
Samolus, Genus
Sanguisorba, Genus
Sanicula, Genus
Santalaceae, Family
Santalales, Order
Sanvitalia, Genus
Sapindaceae, Family
Sapindales, Order
Saponaria, Genus
Satureja, Genus
Saxifraga, Genus
Saxifragaceae, Family
Saxifragales, Order
Scabiosa, Genus
Scandix, Genus
Scheuchzeria, Genus
Scheuchzeriaceae, Family
Schoenoplectus, Genus
Schoenus, Genus
Scilla, Genus
Scirpoides, Genus
Scirpus, Genus
Scleranthus, Genus
Scorzonera, Genus
Scorzoneroides, Genus
Scrophularia, Genus
Scrophulariaceae, Family
Scrophulariaceae p.p., Family
– synoniem van Orobanchaceae, Family
Scrophulariaceae pp, Family
– synoniem van Plantaginaceae, Family
Scutellaria, Genus
Secale, Genus
Securigera, Genus
Sedum, Genus
Selaginella, Genus
Selaginellaceae, Family
Selaginellales, Order
Selinum, Genus
Sempervivum, Genus
Senecio, Genus
Serratula, Genus
Seseli, Genus
Sesleria, Genus
Setaria, Genus
Sherardia, Genus
Silaum, Genus
Silene, Genus
Silybum, Genus
Simaroubaceae, Family
Sinapis, Genus
Sisymbrium, Genus
Sisyrinchium, Genus
Sium, Genus
Skimmia, Genus
Smyrnium, Genus
Solanaceae, Family
Solanales, Order
Solanum, Genus
Soleirolia, Genus
Solidago, Genus
Sonchus, Genus
Sorbaria, Genus
Sorbus, Genus
Sorghum, Genus
Sparganiaceae, Family
Sparganium, Genus
Spartina, Genus
Spergula, Genus
Spergularia, Genus
Spermatopsida, Class
Spinacia, Genus
Spiranthes, Genus
Spirea, Genus
Spirodela, Genus
Stachys, Genus
Staphylea, Genus
Staphyleaceae, Family
Stellaria, Genus
Stratiotes, Genus
Suaeda, Genus
Subularia, Genus
Succisa, Genus
Sutera, Genus
Symphoricarpos, Genus
Symphyotrichum, Genus
Symphytum, Genus
Syringa, Genus