. 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. SYMMETEY OF THE FLOWER. 93 Arrests and suppress
. 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. SYMMETEY OF THE FLOWER. 93 Arrests and suppressions are due to failures of development, and affect more than all other causes the symmetry of the flower. Arrest is the condition of an organ the growth of which has stopped, so that it is reduced to a sort of stump, sometimes glandular; suppression implies that an organ has never even been developed. The outer whorls are more seldom arrested or suppressed than the andrcecium and espe- cially the pistil, which occupies but a narrow area of the receptacle. The suppression or arrest of one or more pieces of a whorl affects the symmetry of number, position and form. For example, Berberis, whose calyx, corolla and andrcecium are in threes or multiples of thj-ee, has for pistil a single carpel; the Pink (fig. 488), whose other whorls are quinary, has but two carpels; the Heartsease three (fig. 489); in the Bitter Vetch (fig. 490) and other Papilion- acecB, the two first whorls are quinary, the third decennary,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Le Maout, Emm. (Emmanuel), d. 1877; Decaisne, J. (Joseph); Hooker, Frances Harriet Henslow, 1825-1847; Hooker, Joseph Dalton, Sir, 1817-1911; Le Maout, Emm. (Emmanuel), d. 1877. Traite? ge?ne?ral de botanique descriptive et analytique. London, Longmans, Gree
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1873
