Rodica
BERCU
Department
of Botany, Faculty of Natural and Agriculture Sciences, “Ovidius”
University, Mamaia Str. 124, 900590, Constantza, Romania, E-mail:
rodicabercu@yahoo.com
|
Key
words: anatomy,
variation,
vascular
system, estimation, Asplenium trichomanes-ramosum |
SYNOPSIS
The paper provides new data regarding the variation of the vascular system in the vegetative organs of Asplenium trichomanes-ramosum L. The anatomical structure of the adventitious root (starting up directly from the underground stem), rhizome (stem) and the frond’s petiole and rachis exhibit a diarch type root, a dictyostelic rhizome and an X- and T-shaped petiole and rachis vascular system up to the subterminal rachis. Based on the variation of the vascular system in A. trichomanes-ramosum anatomy we used a mathematical calculation to estimate the number of the vascular bundles in the fern vegetative organs. |