Pseudofumaria lutea
Yellow Corydalis
Pseudotsuga menziesii
Douglas Fir
Pulmonaria officinalis
Lungwort
Pyrus communis
Pear
Quercus cerris
Turkey Oak
Quercus ilex
Evergreen Oak
Reseda luteola
Weld
Reynoutria japonica
Japanese Knotweed
Robinia pseudoacacia
False-acacia
Rumex obtusifolius
Broad-leaved Dock
Sagina apetala
Annual Pearlwort
Sagina procumbens
Procumbent Pearlwort
Sambucus nigra
Elder
Saponaria officinalis
Soapwort
Sedum album
White Stonecrop
Senecio cambrensis
Welsh Groundsel
Senecio squalidus
Oxford Ragwort
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Setaria viridis
Green Bristle-grass
Sinapis arvensis
Charlock
Sisymbrium officinale
Hedge Mustard
Soleirolia soleirolii
Mind-your-own-business
Solidago canadensis
Canadian Goldenrod