| Name | Notes |
|---|---|
| tuning fork algae | Bifurcaria bifurcata (cystoseiraceae) |
| Key criteria: | Large distinctive perennial cylindrical regularly dichotomously branched with distinctive warty apical receptacles. Generally pool-dwelling but occurs occasionally on open rock in some places in Ireland. Irregular south- western and western distribution pattern; generally more common on porous rocks such as limestone. rock pool |
| bushy feather wrack | Cystoseira foeniculacea (cystoseiraceae) |
| Key criteria: | A fairly uncommon species in the area usually found in pools in the lower intertidal and with a restricted south- western distribution pattern. lower intertidal intertidal pool |
| bushy rainbow wracks | Cystoseira tamariscifolia (cystoseiraceae) |
| Key criteria: | A common species widely distributed on southern and western shores locally abundant in the south. ~ |
| bushy berry wrack | Cystoseira baccata (cystoseiraceae) |
| Key criteria: | A south-western and western species of limited distribution but locally abundant in lower intertidal pools and the shallow subtidal. The most striking and readily identified of our Cystoseira species. lower intertidal intertidal shallow subtidal subtidal pool |
| little bushy wrack | Cystoseira humilis var. myriophylloides (cystoseiraceae) |
| Key criteria: | A rare species found in lower intertidal pools and restricted to south-west England. lower intertidal intertidal pool |
| bushy nodule wrack | Cystoseira nodicaulis (cystoseiraceae) |
| Key criteria: | An uncommon species with a southern and western distribution pattern. Usually subtidal but occasionally in intertidal pools. intertidal subtidal pool |
| sea oak | Halidrys siliquosa (cystoseiraceae) |
| Key criteria: | A large common and widely distributed lower intertidal pool-dweller easily recognised by it seedpod-like gas bladders. It also occurs in the subtidal and often forms a zone below the lower limit of Laminaria hyperborea. lower intertidal intertidal subtidal pool |
A Check-list and Atlas of the Seaweeds of Britain and Ireland. F. G. Hardy and M. D. Guiry. The British Phycological Society, 2003. ISBN 0 9527115 16 Seaweeds of Britain and Ireland. Bunker, Brodie, Maggs and Bunker. Seasearch 2012.