Family: Fabaceae
Calicotome spinosa, commonly known as spiny-broom, is a small, densely branched shrub native to the Mediterranean region. It typically grows up to 1–2 meters tall and is recognized by its sharp, spiny branches and bright yellow, pea-like flowers that bloom in spring. This hardy plant is well-adapted to dry, rocky soils and is often used for soil stabilization, erosion control, and as an ornamental shrub for its striking flowers. Its spiny nature can also make it useful as a natural barrier or hedge in gardens and landscapes.
While attractive in some settings, Calicotome spinosa can pose ecological risks when introduced outside its native range. Its dense, spiny growth can crowd out native vegetation, reducing habitat availability for local wildlife. The plant’s ability to tolerate poor soils and dry conditions allows it to establish in disturbed areas, where it may spread aggressively. Care should be taken when planting this species, and it is important to monitor and manage its growth to prevent it from becoming invasive.
High Risk Traits:
- Naturalized beyond native range
- Agricultural/environmental weed
- Produces spines/thorns
- Shade tolerant
- Tolerates wide soil range
- Forms dense thickets
- Nitrogen-fixing woody plant
- Produces viable seed
- Human-dispersed (intentional/contaminant)
- Broad climate suitability
Low Risk Traits:
- Not parasitic
- Not aquatic/grass/geophyte
- Not dispersed by wind/water/birds
- Not tropical/subtropical native
