Pteridium aquilinum
Scrub communities, including pure stands of bracken "Pteridium aquilinum" occur on the cliff slopes and tops and particularly in the valleys. European gorse "Ulex europaeus", bramble "Rubus fruticosus" agg. and blackthorn "Prunus spinosa" are frequent, associated with cock's-foot, bluebell and, locally, honeysuckle "Lonicera periclymenum" and ivy "Hedera helix".