Strophanthus Dichot'Omus, False Strophanthus Seeds. These are chestnut-brown and less densely covered with hairs, otherwise resemble the official.
Apoc'Ynum Cannab'Inum, Apocynum, Canadian Hemp, Dogbane. The dried rhizome, official 1830-1910; United States, Canada to Florida. Perennial milky-juiced herb, 1-2 M. (3-6°) high, glabrous, branched; leaves opposite, entire, mucronate; flowers, cymes, greenish-white; fruit acute follicle, 20 Cm. (8') long, 4 Mm. (1/6') thick. Rhizome, variable length, 3-8 Mm. (1/8-1/3') thick, cylindical, longitudinally wrinkled, transversely fissured, yellowish, brownish, brittle; wood yellowish, radiate, porous; bark tough fibrous, containing laticiferous ducts and bitterness - 50-65 p. c. of the root; solvents: boiling water alcohol (65 p. c); contains cynotoxin (most active), apocynin, tannin, resin, starch, ash 5 p. c. Diuretic, diaphoretic, expectorant, antiperi-odic, alterative, cardiac stimulant (similar to digitalis); emetic; cardiac and renal dropsy, intermittents, dyspepsia. Dose, gr. 2-5 (.13-3 Gm.); emetic, gr. 15-30 (1-2 Gm.); fluidextract (glycerin 10, ale. 60, water 30), eij-5 - 30 (.13 - .3 - 2 Ml. (Cc.)); also in aqueous extract, decoction, tincture.
Fig. 320. - Apocynum cannabinum: root, transverse section, magnified 25 diam.
3. A. androsoemifo'lium, Spreading Dogbane. - The rhizome (root), official 1820-1880; N. America. Grows associated with the preceding, having stem more spreading, leaves broader, rhizome thinner, tougher, with central pith; bark thinner with layer of stone cells; flowers pinkish; contains (supposedly) about the same as A. cannabinum, causing it to be used for similar purposes, but, as a fact, it produces quite different effects.