This section is from the book "A Manual of Materia Medica and Pharmacology", by David M. R. Culbreth. Also available from Amazon: Manual of Materia Medica and Pharmacology.
Fu'Cus Vesiculo'Sits, Bladdep-Wrack. Atlantic Ocean. Grows on muddy rocks and often floats to the shore; it is 1 M. (40') long, 15 Mm. (3/5') broad, flattened, branched, with a midrib. Air vessels in pairs, blackish, odor seaweed-like, taste mucilaginous, saline. F. nodo'sus is narrow, without midrib, air vessels single, otherwise similar; contains organic matter (mainly mucilage with little mannite, fat, etc.) 62 p. c, volatile oil (trace), moisture 22 p. c, ash 25 p. c. - chlorides, bromides, iodides, phosphates, sulphates (sodium, potassium). Alterative, in obesity. Dose, 3ij (8 Gm.), in decoction; fluidextract (75 p. c. alcohol).
3. Dulse (Halyme'nia (Fucus) palma'tus and H. ed'ulis). - Atlantic and Mediterranean coasts; blood-red - when dry dark purple, fronds flat.
Ceylon Moss. Indian Ocean. Mostly Sphoerococ'cus lichenoi'des, 10 Cm. (4') long, 1.5 Mm. (1/16') thick, cylindrical, forked, filiform above; reddish - when dry whitish, brittle.
Corsican Moss. Mediterranean. A mixture of 20-30 different Algae species, mainly Sphoerococcus (Fucus) genus; these are yellowish-brown.
 
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