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Chondrus crispus
''Chondrus crispus'' — commonly called Irish moss or carrageen moss (Irish ''carraigín'', "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 this protist is soft and cartilaginous, varying in color from a greenish-yellow, through red, to a dark purple or purplish-brown. The principal constituent is a mucilaginous body, made of the polysaccharide carrageenan, which constitutes 55% of its weight. The organism 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 boiled, containing from 20 to 100 times its weight of water.
== Description ==
''Chondrus crispus'' is a relatively small red alga, reaching up to a little over than 20 cm in length. It grows from a discoid holdfast and branches four or five times in a dichotomous, fan-like manner. The morphology is highly variable, especially the broadness of the thalli. The branches are 2–15 mm broad, firm in texture and dark reddish brown in color bleaching to yellowish in sunlight. The gametophytes (see below) often show a blue iridescence at the tip of the fronds and fertile sporophytes show a spotty pattern. ''Mastocarpus stellatus'' (Stackhouse) Guiry is a similar species which can be readily distinguished by its strongly channelled and often somewhat twisted thallus. The cystocarpic plants of ''Mastocarpus'' show reproductive papillae quite distinctively different from ''Chondrus''. When washed and sun-dried for preservation, it has a yellowish, translucent, horn-like aspect and consistency.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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