29. Nymphaeae.—Water lily family.
Aquatic plants, with peltate or cordate leaves from a prostrate rhizome.
132. NYMPHAEA.—WATER LILY. The rhizome of Nymphae'a odora'ta Aiton. Habitat: United States, in ponds. About 500 mm. (20 in.) long and 50 mm. (2 in.) thick, usually broken up into grayish, spongy segments, consisting mainly of parenchyma, with a few scattered wood-bundles. Inodorous; taste mucilaginous and astringent. Used as a demulcent and astringent. Dose: 15 to 30 gr. (1 to 2 Gm.).
The rhizome of Nu'phar ad'vena Nuttall, Yellow Pond Lily, has similar properties and uses.