CLASSIFICATION OF THE ARCHITECTURE OF DICOTYLEDONOUS LEAVES

American Journal of Botany - Tập 60 Số 1 - Trang 17-33 - 1973
Leo Hickey1
1Division of Paleobotany, Smithsonian Institution, Washington, D. C.

Tóm tắt

A classification of the architectural features of dicot leaves—i.e., the placement and form of those elements constituting the outward expression of leaf structure, including shape, marginal configuration, venation, and gland position—has been developed as the result of an extensive survey of both living and fossil leaves. This system partially incorporates modifications of two earlier classifications: that of Turrill for leaf shape and that of Von Ettingshausen for venation pattern. After categorization of such features as shape of the whole leaf and of the apex and base, leaves are separated into a number of classes depending on the course of their principal venation. Identification of order of venation, which is fundamental to the application of the classification, is determined by size of a vein at its point of origin and to a lesser extent by its behavior in relation to that of other orders. The classification concludes by describing features of the areoles, i.e., the smallest areas of leaf tissue surrounded by veins which form a contiguous field over most of the leaf. Because most taxa of dicots possess consistent patterns of leaf architecture, this rigorous method of describing the features of leaves is of immediate usefulness in both modern and fossil taxonomic studies. In addition, as a result of this method, it is anticipated that leaves will play an increasingly important part in phylogenetic and ecological studies.

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Tài liệu tham khảo

Berry E. W.1916.The lower Eocene floras of southeastern North America. U.S. Geol. Surv. Prof. Paper 91.

10.1002/j.1537-2197.1971.tb10011.x

10.1002/j.1537-2197.1971.tb09994.x

10.1002/j.1537-2197.1970.tb09801.x

10.5962/bhl.part.24686

Ettingshausen C., 1861, Die Blattskelete des Dicotyledonen

Federov A. A., 1956, Atlas po opisatelnoi morfologii visshich rastenii

10.2307/2437967

10.2307/2438624

Goebel K.1905.Organography of plants. Eng. ed. byI. B.Balfour. Part II.Oxford.

Hickey L. J., 1971, Leaf architectural classification of the Angiosperms (abstr.), Amer. J. Bot., 58, 450

Hickey L. J., 1971, Evolutionary significance of leaf architectural features in the woody dicots (abstr.), Amer. J. Bot., 58, 469

Hickey L. J.In press.Stratigraphy and Paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota:Geol. Soc. Amer. Memoir.

Hollick A.1936.The Tertiary floras of Alaska. U.S. Geol. Surv. Prof. Paper 182.

Kerner von Marilaun A. J., 1895, The natural history of plants

Krussmann G., 1960, Handbuch der Laubgehölze

Lam H. J., 1925, The Sapotaceae, Sarcospermaceae, and Boerlagellaceae of the Dutch East Indies and surrounding countries, Bull. Jard. Bot. Buitenzorg III, 8, 1

Lawrence G. H., 1951, Taxonomy of vascular plants

Lee A. T., 1948, The genus Swainsona, Contrib. New South Wales Herb., 1, 131

Lesquereux L.1878.Contributions to the fossil floras of the Western Territories.Part II. The Tertiary Flora. U.S. Geol. Geog. Surv. Terr. Rept. 7.

Pacltová B., 1961, Zur Frage der gattung Eucalyptus in der böhmischen Dreideformation, Preslia, 33, 113

Stearn W. T.1956.InP.Synge[ed.] Supplement to the Dictionary of Gardening.Oxford. p.318–322.

Systematics Association Committee for Descriptive Terminology (SADT), 1962, Terminology of simple symmetrical plane shapes (Chart 1), Taxon, 11, 145, 10.2307/1216718

Takhtajan A. L.1963.InA. L.Takhtajan V. A.Vakhremeev andG. P.Radchenko[ed.] Osnovy paleontologii Golosemennye i pokrytosemennye.Moskow. p.395–399.

Troll W., 1938, Vergleichende Morphologie der höhern Pflanzen., 1

Wolfe J. A.1966.Tertiary plants from the Cook Inlet Region Alaska. U.S. Geol. Surv. Prof. Paper 398‐B.

Wolfe J. A.1968.Paleogene biostratigraphy of nonmarine rocks in King Co. Washington. U.S. Geol. Surv. Prof. Paper 571.

Wolfe J. A., 1969, Paleogene floras from the Gulf of Alaska Region

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American Journal of Botany

Tập 60 Số 1

17-33

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