An introduction to pharmacognosy / by Smith Ely Jelliffe.

  • Smith Ely Jelliffe
Date:
1904
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to pharmacognosy / by Smith Ely Jelliffe. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    True vessels are not found in the root of ipecac, unless the vessel-like tracheids are included under that head; functionally they certainly are vessels and, morphologi- cally, approach them closely. If portions of the rhizome are included in the powder of the root, spiral vessels similar to those figured may be found, also typical stone- like parenchymatic cells, also figured. Adulterations and Substitutions.—-Undulated Ipecac.— Richardsonia scahra has well-marked medullary rays and spiral vessels. Undulated and wrinkled transversely in the form of shallow constrictions, brownish-gray, bark white, mealy, not hitter. The wood is nearly as thick as bark. ]\Iicroscopically, two round medullary ray rows, vessels, and wood fibres are sufficiently distinctive. White Ipecac.—From lonidium Ipecacuanha. ViolacecB.' Somewhat branched, contorted, not annulate, longi- tudinally wrinkled, whitish or pale brownish-yellow, root porous, free from starch, 2 mm. thick. In powder, stone cells are found. New cortex also contains sieve tubes. One-rowed medullary rays are also to be found and a few vessels. Striated Ipecac.—Psychotria emetica. Vogl calls it /. glycyphlcea. Longitudinally wrinkled, not annulate, 8 microns thick, grayish-brown, sweet, no starch, no emetic. Cortex waxy, inner half of periderm made up of regular cells, tinged with dark violet. These have no starch, but there are numerous crystals of calcium oxalate. Chemistry.—The chief constituents are emetine, i to 2 per cent.; ipecacuanhic acid, an amorphous, bitter glycoside, tannin, volatile oil, starch, gum, etc. RADIX SENEGiE. SENEGA. The root of Polygala Senega, from the United States. Two varieties, Minnesota and Manitoba Senega, are generally recognized. Description. — The root is elongated, sharply triangu-
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