Phylum: Rhodophyta   Family: Rhodomelaceae

Osmundea hybrida  (A.P. de Candolle) K.W. Nam, 1994

False Pepper Dulse

A species of the middle tidal zone with a small disc holdfast, usually growing to no more than 90 mm long with a pyramidal outline. Dark purple to greenish but sometimes yellow, with cylindrical, cartilaginous fronds

References: 
Maggs & Hommersand (1993) - Seaweeds of the British Isles, Volume 1 Rhodophyta, Part 3A Ceramiales