Scilla peruviana
Portuguese Squill
Scilla siberica
Siberian Squill
Scilla verna
Spring Squill
Scleranthus annuus
Annual Knawel
Scleranthus perennis
Perennial Knawel
Scorzoneroides autumnalis
Autumn Hawkbit
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Scrophularia umbrosa
Green Figwort
Scutellaria galericulata
Skullcap
Scutellaria minor
Lesser Skullcap
Sedum acre
Biting Stonecrop
Sedum album
White Stonecrop
Sedum anglicum
English Stonecrop
Sedum forsterianum
Rock Stonecrop
Sedum kamtschaticum
Kamchatka Stonecrop
Sedum rosea
Roseroot
Sedum rupestre
Reflexed Stonecrop
Sedum sexangulare
Tasteless Stonecrop
Sedum spurium
Caucasian-stonecrop
Sedum telephium
Orpine
Sempervivum arachnoideum
Cobweb House-leek
Senecio aquaticus
Marsh Ragwort
Senecio cambrensis
Welsh Groundsel