Self-heal ~ Prunella vulgaris.
Description: Up to 50cm. Elaborate head from which blue/purple flowers 15mm
Location: Waste areas and grassland
Flowering: March to November

Silverweed ~ Potentilla anserina.
Description: Creeping to 80cm. Yellow flowers to 30mm. Silvery sheen on leaves
Location: Anywhere, rock shore
Flowering: June to August

Sneezewort ~ Achillea ptarmica.
Description: Up to 150cm. White/cream flowers to 20mm
Location: Damp grassland, acid soil
Flowering: July to September