Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This 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.

The Development of Vessels in Angiosperms and its Significance in Morphological Research

I. W. Bailey
American Journal of Botany
Vol. 31, No. 7 (Jul., 1944), pp. 421-428
Stable URL: http://www.jstor.org/stable/2437302
Page Count: 8
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
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.
The Development of Vessels in Angiosperms and its Significance in Morphological Research
Preview not available

Abstract

Vessels have originated independently in five distinct categories of the Tracheophyta, viz. Selaginellales, Filicales, Gnetales, monocotyledons and dicotyledons. The origins and salient trends of specialization of vessels in the primary bodies of monocotyledons and in both the primary and secondary bodies of dicotyledons are clearly definable upon the basis of available evidence preserved in extant representatives of the angiosperms. The irreversible phylogenetic trends in the origins and specializations of vessels are so comprehensive and reliable that they deserve serious consideration in various lines of botanical research. Their significance in the fields of comparative and developmental morphology are discussed in this paper, leaving their significance in the discussion of physiological problems for future consideration.

Page Thumbnails

  • Thumbnail: Page 
421
    421
  • Thumbnail: Page 
422
    422
  • Thumbnail: Page 
423
    423
  • Thumbnail: Page 
424
    424
  • Thumbnail: Page 
425
    425
  • Thumbnail: Page 
426
    426
  • Thumbnail: Page 
427
    427
  • Thumbnail: Page 
428
    428