Common Buckthorn
Rhamnus cathartica
Common Buckthorn is a deciduous, thorny shrub or small tree that can grow up to six meters in height. It is characterized by nearly opposite leaves with arcuate venation and black, berry-like drupes. The plant prefers calcareous soils and is commonly found in hedgerows, open woodlands, forest edges, and riparian zones.
Details
Habitat function
Provides shelter and nesting opportunities for songbirds and serves as an essential food source for specialized insects.
Food source for
Brimstone butterfly (Gonepteryx rhamni), Holly Blue (Celastrina argiolus), various thrush species.
Human use
Historically used as a laxative (purgative) and for the production of dyes (sap green) from the berries.
Ecology
Ecological role
Important host plant for the caterpillars of the Brimstone butterfly (Gonepteryx rhamni) and a nectar source for insects; fruits serve as food for birds.
Natural predators
Various insect larvae, frugivorous birds, browsing by roe deer.
Competitor species
Other shrub-forming species such as Blackthorn or Hawthorn in hedgerow habitats.
Ecosystem service
Soil stabilization, habitat provision for pollinators and birds, windbreak in agricultural landscapes.
Threats
Loss of hedgerow structures in the agricultural landscape, intensive forestry.
Scientific profile
Profile
Protection & threats
Main threats
Not threatened in Europe; local declines due to hedge removal and agricultural intensification.