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Scirpus
Genus, Flowering plant, Freshwater
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Scleranthus
Genus, Flowering plant, Freshwater
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Scorzonera
Genus, Flowering plant, Freshwater
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Scrophularia – Figwort
Genus, Flowering plant, Freshwater, terrestrial
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Scutellaria
Genus, Flowering plant, Freshwater, terrestrial
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Selinum
Genus, Flowering plant, Freshwater
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Senecio – Ragwort
Genus, Flowering plant, Freshwater, terrestrial
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Silene – Campion
Genus, Flowering plant, Freshwater, terrestrial
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Sium
Genus, Flowering plant, Freshwater
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Solanum – Nightshade
Genus, Flowering plant, Freshwater, terrestrial
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Solidago – Goldenrod
Genus, Flowering plant, Freshwater, terrestrial
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Sonchus – Sow-Thistle
Genus, Flowering plant, Freshwater
Sow Thistle
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Sparganium
Genus, Flowering plant, Freshwater, terrestrial
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Stellaria
Genus, Flowering plant, Freshwater
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Symphytum – Indet. Comfrey
Genus, Flowering plant, Freshwater, terrestrial
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Tanacetum
Genus, Flowering plant, Freshwater, terrestrial
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Tephroseris
Genus, Flowering plant, Freshwater
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Teucrium
Genus, Flowering plant, Freshwater, terrestrial
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Thalictrum
Genus, Flowering plant, Freshwater, terrestrial
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Thymus
Genus, Flowering plant, Freshwater, terrestrial