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Plant Systematics and Evolution

, Volume 257, Issue 3–4, pp 223–232 | Cite as

Floral ontogeny of Cneorum tricoccon L. (Rutaceae)

  • P. Caris
  • E. Smets
  • K. De Coster
  • L. P. Ronse De Craene
Article

Abstract

The floral ontogeny of the Spurge olive (Cneorum tricoccon L.) is studied by means of scanning electron microscopic observations. Special attention is paid to the sequence of initiation of the floral parts, the occurrence of septal cavities, and the development of the nectariferous tissue. The nectary disc arises as a receptacular outgrowth below the ovary and independently from stamen development. By the extensive growth of this voluminous androgynophore, stamen filaments become enclosed by nectary tissue and as a result, they are seated in pits between the lobes of the disc. Between ovary and style, three lobes are present, which are covered with stomata – their function is unknown. The significance of the unusual trimery of the flower is discussed. Floral developmental evidence supports a Rutalean affinity, although more ontogenetic investigations are needed in Rutaceae, subfamily Spathelioideae.

Keywords

Androgynophore Cneoraceae Cneorum tricoccon L. Floral ontogeny Nectary Rutaceae Spurge olive 

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Copyright information

© Springer-Verlag Wien 2006

Authors and Affiliations

  • P. Caris
    • 1
  • E. Smets
    • 1
  • K. De Coster
    • 1
  • L. P. Ronse De Craene
    • 2
  1. 1.Laboratory of Plant SystematicsInstitute of Botany and MicrobiologyK.U.LeuvenBelgium
  2. 2.Royal Botanic Garden EdinburghEdinburghUK

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