Wikipedia Article About Carrageen on Wikipedia Irish moss, or carrageen moss (Irish carraigín, "moss of the rock") is a species of red algae (Chondrus crispus) which grows abundantly along the rocky parts of the Atlantic coast of Europe and North America. In its fresh condition the plant is soft and cartilaginous, varying in colour from a greenish-yellow to a dark purple or purplish-brown; but when washed and sun-dried for preservation it has a yellowish translucent horn-like aspect and consistency. The principal constituent of Irish moss is a mucilaginous body, of which it contains about 55%; the plant also has nearly 10% of albuminoids and about 15% of mineral matter, and is rich in iodine and sulphur. When softened in water it has a sea-like odour, and because of the abundant mucilage i