Buckthorn

Buckthorn - Rhamnus cathartica

Alternative names
Purging Buckthorn
Description

Shrub or small tree to 6 metres. Old branches ending in a spine tip. Leaves oval, opposite or clustered, long stalked and toothed. Flowers greenish 3 to 4 mm in dense clusters arising from the older branches or solitary. The male and female flowers on separate plants. Berries black when ripe.

Identification difficulty
Habitat

Woodland scrub and hedgerows.

When to see it

May and June.

Life History

Deciduous.

UK Status

Fairly frequent in England but much less so in Scotland and Wales.

VC55 Status

Fairly frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 233 of the 617 tetrads.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Additional images

All NatureSpot records

Photo of the association

Stigmella catharticella

The larva of the moth Stigmella catharticella mines the leaves of Buckthorn, producing a long straight slender gallery, turning into a series of 'S' turns. Frass may be either dispersed or coiled. 

Photo of the association

Crown Rust

Puccinia coronata is a rust fungus which affects Buckthorn. The orange aecia cause galls on the leaf blade and petioles, which may cause them to become twisted and distorted.

Photo of the association

Aequsomatus annulatus

The gall mite Aequsomatus annulatus causes galls to form on the leaves of Buckthorn. An erineum is visible between the veins on the underside of the leaf, the blade becomes thickened and sometimes hairy on the upperside.

Photo of the association

Jumping Plant Louse

The Jumping Plant Louse, Trichochermes walkeri, causes the leaf margin to curl and a gall to be formed on the leaves of Buckthorn. The gall is more likely to be seen than the adult plant louse.