Observations on the Ligulate Tip

Authors

  • Douglas J. Gardner
  • Fred W. Taylor

Keywords:

Ligulate tip, vessel element, vessel arrangement

Abstract

Statistical analyses were used to categorize interactions among morphological characteristics of ligulate tips and other characteristics of vessel elements. The results indicate that the ligulate tip is an evolutionary artifact. The phylogenetic specialization of ring porous genera has resulted in mucronate tips with minor overlap.

References

Bailey, I. W. 1944. The development of vessels in angiosperms and its significance in morphological research. Am. J. Bot. 31:421-428.nCarpenter, C., L. Leney, H. A. Core, W. A. Côté, and A. C. Day. 1963. Papermaking fibers. Technical Publication No. 74. State University College of Forestry at Syracuse, NY.nEsau, K. 1977. Anatomy of seed plants, 2nd ed. John Wiley and Sons. New York, p. 132.nFrost, F. H. 1930. Specialization in secondary xylem of dicotyledons. II. Evolution of end wall of vessel segment. Bot. Gaz. 90:198-212.nGilbert, S. G. 1940. Evolutionary significance of ring porosity in woody angiosperms. Bot. Gaz. 102:105-120.nPanshin, A. J., and C. deZeeuw. 1980. Textbook of wood technology. McGraw-Hill, New York.nParham, R. A., and R. L. Gray. 1982. The practical identification of wood pulp fibers. TAPPI Press, Atlanta, GA.nSteele, G. D., and J. H. Torrie. 1960. Principles and procedures of statistics. McGraw-Hill, New York.n

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Published

2007-06-28

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Section

Research Contributions