| Palmaria palmata | 
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| Scientific classification | 
| Clade: | Archaeplastida | 
 
| Division: | Rhodophyta | 
 
| Class: | Florideophyceae | 
 
| Order: | Palmariales | 
 
| Family: | Palmariaceae | 
 
| Genus: | Palmaria | 
| Species: | P. palmata | 
| Binomial name | 
| Palmaria palmata 
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| Synonyms | 
| Ceramium palmatum (Linnaeus) Stackhouse, 1797Delesseria palmata (Linnaeus) J.V.Lamouroux, 1813Delesseria sobolifera (M.Vahl) J.V.Lamouroux, 1813Fucus bullatus O.F.Müller, 1777Fucus caprinus (Gunnerus) Vahl, 1794Fucus delicatulus (Gunnerus) Vahl, 1797Fucus dulcis S.G.Gmelin, 1768Fucus foliaceus Ström, 1788Fucus ovinus Gunnerus, 1766Fucus palmatus Linnaeus, 1753Fucus rubens Esper, 1799Fucus rubescens Sommerfelt, 1826Fucus sarniensis Roth, 1806Fucus soboliferus M.Vahl, 1792Halymenia palmata (Linnaeus) C.Agardh, 1817Halymenia sobolifera (M.Vahl) C.Agardh, 1817Palmaria expansa Stackhouse, 1809Palmaria lanceolata Stackhouse, 1809Rhodymenia palmata (Linnaeus) Greville, 1830Rhodymenia sobolifera (M.Vahl) Greville, 1830Sphaerococcus palmatus (Linnaeus) Wahlenberg, 1826Sphaerococcus sarniensis (Roth) C.Agardh, 1817Sphaerococcus soboliferus (M.Vahl) Kützing, 1843Ulva caprina Gunnerus, 1772Ulva delicatula Gunnerus, 1772Ulva palmata (Linnaeus) Withering, 1796Ulva sobolifera (M.Vahl) Lyngbye, 1819
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Palmaria palmata, also called dulse, dillisk or dilsk (from Irish/Scottish Gaelic duileasc/duileasg), red dulse, sea lettuce flakes, or creathnach, is a red alga (Rhodophyta) previously referred to as Rhodymenia palmata. It grows on the northern coasts of the Atlantic and Pacific Oceans. It is a well-known snack food. In Iceland, where it is known as söl [ˈsœːl̥], it has been an important source of dietary fiber throughout the centuries.