African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 757

Full Length Research Paper

Foliar anatomy of some species of Asteraceae in South Western Nigeria

AKINNUBI Funmilola Mabel
  • AKINNUBI Funmilola Mabel
  • Department of Botany, Faculty of Science, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
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AKINLOYE Akinwumi Johnson
  • AKINLOYE Akinwumi Johnson
  • Department of Botany, Faculty of Science, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
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OLALEYE-OTUNLA Olufemi
  • OLALEYE-OTUNLA Olufemi
  • Department of National History Museum, O.A.U., Ile-Ife, Osun State, Nigeria.
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ADENEGAN-ALAKINDE Taiwo Ayomipo
  • ADENEGAN-ALAKINDE Taiwo Ayomipo
  • Department of Biology, Adeyemi College of Education, Ondo, Ondo State, Nigeria.
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  •  Received: 03 June 2014
  •  Accepted: 02 September 2014
  •  Published: 30 September 2014

Abstract

The foliar anatomy of 12 species of Asteraceae around Ile Ife in South Western, Nigeria was described. The distinguishing characteristics of taxonomic value include; venation patterns, areole shapes, number of veinlet endings, trichome types, arrangement of vascular bundles. Venation types are actinodromous, craspedodromous or camptodromous, the presence of rectangular areoles are predominant in the species studied and this show family characteristics. However, the presence of crystal druses in the areoles of C. odorata is of diagnostic importance. The type of vascular bundle in the leaf midribs is classificatory as it divided the taxa studied into two groups; vascular bundles are amphicribal in Bidens pilosa, Chromolaena odorata, Launaea taraxacifolia, Crassocephalum crepidiodes, Tridax procumbens and Vernonia cinerea and bicollateral in Ageratum conyzoides, Aspilia africana, Emilia praetermissa, Synedrella nodiflora, Tithonia diversifolia and Vernonia amygdalina.

 

Key words: Asteraceae, foliar, taxonomic, venation, areole.