Annual Mercury
Mercurialis annua
This annual has simple oval leaves and produces small, inconspicuous greenish flowers. It can appear rapidly on disturbed ground, benefiting from mild coastal climates.
- Habitat: Disturbed soils, field edges, gardens, and waste ground.
- When to See: Germinates in spring, flowers in summer; can persist into autumn.
- Length: Typically 20–50 cm tall.