Taxon Description (Wikipedia)
Chondrus crispus, known under the common name
Irish moss, or
carrageen moss (Irish
carraigĂn, "little rock"), is a species of red algae 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 color from a
greenish-yellow, through red, to a dark purple or purplish-brown. The principal constituent of Irish moss is a mucilaginous body, made of the polysaccharide carrageenan of which it contains about 55%. The plant also consists of nearly 10% protein and about 15% mineral matter, and is rich in iodine and sulfur. When softened in water it has a sea-like odour, and because of the abundant cell wall polysaccharides it will form a jelly when...
full article at Wikipedia