. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. CLII. DICHONDEE^. 567 ConvohulacecB are chiefly
. A general system of botany, descriptive and analytical. In two parts. Part I. Outlines of organography, anatomy, and physiology. Part II. Descriptions and illustrations of the orders. By Emm. Le Maout [and] J. Decaisne. With 5500 figures by L. Steinheil and A. Riocreux. Translated from the original by Mrs. Hooker. The orders arranged after the method followed in the universities and schools of Great Britain, its colonies, America, and India; with additions, an appendix on the natural method, and a synopsis of the orders, by Hooker. Botany. CLII. DICHONDEE^. 567 ConvohulacecB are chiefly tropical; they decrease northwards, and are very rare in our climate, and absolutely wanting in the arctic regions and on mountains. Many species possess a milky juice contain- ing a highly purgative resin ; this resin, which especially abounds in the rhizome, owes it* properties solely to the presence of an aromatic principle ; for rhizomes which have been pulverized and long ex- posed to the air lose it, although preserving the purely resinous principle. The species most in use are Jalap (^Convolvulus Jalapa and C. Schiedeanus), from Mexico [the best is from Sxogonium Purga]; the Turbith (C. Turpethuni), a native of the East Indies; Scanimony (C Scammonia and C. sagittcefolius), from the Asiatic Mediterranean region [and the Ipomtzn pandurata of the United States]. The rhizomes of our indigenous Bindweeds are also purgative, but the exotic species are much more active. The American genus Batatas comprises several species in the rhizomes of which (called Sweet Potato) the resinous principle is replaced by an abundant quantity of starch, and they are thus sought for as a food similar to potatos. [^Convolvulus dissectus is said to abound in prussic acid, and to be used iu the preparation of Noyau. Oil of Ehodium is the produce of the rootstock of Shodor/ma.—Ed.] cm. DICHONDRE^, (ConvolVulaoeaeum genera, Endlicher.) This little fiimily may he considered as a tribe of ConvolvUl
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1873
