• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/plnt/095/01/0007-0015

    • Keywords

       

      Anatomy; cotyledonary architecture; venation pattern; Asteraceae

    • Abstract

       

      Cotyledonary blade is symmetrical in all the species of Asteraceae. Morphological features such as base, apex and margin vary from species to species. Venation pattern conforms to pinnate craspedodromous, pinnate camptodromous and acrodromous type. Higher order veins noticed are up to 5°. Primary vein is either stout massive, moderate or weak. The thickness of the veins gradually decreases from primary to higher order veins. Marginal ultimate venation is either incomplete, looped or fimbriate. Areoles are absent inEclipta prostrata, Chrysanthemum segetum andCalendula suffruticosa spalgarbiensis. Vein endings are either simple or branched. In some species veins lack vein endings, which may or may not be associated with tracheids. Tracheids vary in their shape and arrangement in different species. Loop formation is observed. Isolated tracheids and extension cells are observed inCalendula suffruticosa sptomentosa. All categories of veins are jacketed by parenchymatous bundle sheath.

    • Author Affiliations

       

      K Ravindranath1 J A Inamdar1

      1. Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar - 388 120, India
    • Dates

       
  •  

© 2021-2022 Indian Academy of Sciences, Bengaluru.