| Name | Notes |
|---|---|
| beautiful eyelash weed | Calliblepharis ciliata (cystocloniaceae) |
| Key criteria: | Medium-sized with blade-like compressed brittle fronds. Generally epilithic in large lower intertidal pools of rocks and in the shallow subtidal to 21m. Western distribution; mostly absent from the east coast of Britain. epilithic lower intertidal intertidal shallow subtidal subtidal rock pool |
| cleaved wart weed | Gracilaria multipartita (gracilariaceae) |
| Key criteria: | Lower intertidal and subtidal to 15 m. Rock tolerating some sand and mud cover. lower intertidal intertidal subtidal mud sand rock |
| dulse | Palmaria palmata (palmariaceae) |
| Key criteria: | Palmately branched membranous seaweed occasionally reaching a metre in length. Lower intertidal to shallow subtidal. One of the commonest intertidal red algae; widely distributed. Dried plants are eaten in Scotland and Ireland as dulse or dillisk. lower intertidal intertidal shallow subtidal subtidal |
| devil's tongue weed | Grateloupia turuturu (halymeniaceae) |
| Key criteria: | An introduced species referred incorrectly until recently to G. doryphora. Large foliose blades often to 1 m. in length. Only known from mid-south coast of England particularly in the vicinity of the Solent (between the Isle of Wight and the mainland) where it grows epilithically on small loosely embedded stones in shallow pools and drainage channels. epilithic pool |
| northern tooth weed | Odonthalia dentata (rhodomelaceae) |
| Key criteria: | Large (to 20 cm) species with toothed compressed axes growing intertidally in deep pools and subtidally on bedrock. It is very distinctive. It has a distinct northern distribution being confined to northern Britain and north coasts of Ireland. The records for Devon and Co. Mayo are erroneous. intertidal subtidal rock pool |
| starry liver weed | Schizymenia dubyi (schizymeniaceae) |
| Key criteria: | Medium to large foliose generally unbranched or once dichotomously or variously laciniate blades. Occasionally found in moderately wave exposed intertidal pools but most often in the shallow subtidal. Western distribution but relatively rarely recorded. intertidal shallow subtidal subtidal exposed pool |
| Grateloup's fringe weed | Grateloupia subpectinata (halymeniaceae) |
| Key criteria: | Blades up to 70 cm and 1 cm broad. Growing on the lower intertidal and subtidal to 6 m. on lagoons and sheltered areas. Tolerates low salinity. Introduced species. lower intertidal intertidal subtidal sheltered brackish |
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.