Chon'drus cris'pus or Gigarti'na mamillo'sa, Irish Moss, Carrageen, N.F. -- Gigartinaceae. The dried, bleached plants, with not more than 2 p.c. of foreign organic matter; Atlantic Ocean, New England, Irish coast. Entire plants small, matted together, slender dichotomously branching stalk; segments flattened, emarginate, cleft at tips, 5-15 Cm. (2-6') long, 1-10 Mm. (1/25-2/5') broad, yellowish-white, transparent, somewhat cartilaginous, frequently coated with calcareous deposit which effervesces with hydrochloric acid; sporangia embedded (C. Crospus) or on short stalks (G. Mamillosa); odor slight, seaweed-like; taste mucilaginous, saline, solvent: water; contains mucilage (carrageenin--not precipitated by alcohol--gum, or by lead acetate--pectin, or blue with iodine--starch, only slightly adhesive) 55-90 p.c., minerals 14 p.c., albuminoids 9 p.c., water 18 p.c., ash 8-15 p.c. Demulcent, nutrient, dietetic; bronchitis, diarrhea, kidney and bladder affections--diet instead of tapioca, sago, barley. Plants green (fresh) or purplish (dry) are taken from the beach after storms, or are torn by boatmen with rakes from rocks, 3-6 M. (10-20 degrees) under water, then washed in sea water and spread high on shore for drying and bleaching--a process frequently repeated several times. Dose, 3j-2 (4-8 Gm.); 1. Mucilago Chondri, 3 p.c. -- emulsifier; Decoction, 5 p.c. (Water or milk, sweetened and flavored), 3j-2 (30-60 cc.). G. Acicula'ris and G. Pistilla'ta have similar appearance and properties.