You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
New World Juglandaceae. II. Hickory Nut Oils, Phenetic Similarities, and Evolutionary Implications in the Genus Carya
Donald E. Stone, George A. Adrouny and Robert H. Flake
American Journal of Botany
Vol. 56, No. 8 (Sep., 1969), pp. 928-935
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2440634
Page Count: 8
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
15 taxa of Carya, confirm the basic uniformity of fatty-acid composition within the walnut family. All taxa contain small amounts of the saturated fatty acids-palmitic and stearic-and variable amounts of the unsaturated oleic and linoleic acids, and at least trace amounts of linolenic. Quantitative differences in the relative amounts of the five fatty acids support the morphologic recognition of two sections within the genus Members of the section Carya are characterized by higher linoleic and lower oleic acid percentages than are those of section Apocarya. It is also true, however, that tetraploids of section Carya tend to have higher linoleic and lower oleic acid percentages than diploids within the same section. Numerical analyses of the oil data reveal close similarities between certain members of the more "primitive" section Apocarya and the diploid members of section Carya The highly heterogeneous assemblage within section Apocarya could be split into three groups on the basis of oil data. It is equally obvious, however, that the American taxa of the genus Carya have had a long and reticulate phylogeny and that recognition of additional categories above the species level would not result in natural assemblages.
American Journal of Botany © 1969 Botanical Society of America, Inc.