Plant Systematics and Evolution

, Volume 235, Issue 1–4, pp 209–218 | Cite as

Contribution of pollen and tapetal characters to the systematics of Triuridaceae

  • C. A. Furness
  • P. J. Rudall
  • A. Eastman

Abstract.

 Pollen and tapetal characters in the mycoheterotrophic monocot family Triuridaceae are here compared with those of their putative relatives, including the lilioid order Pandanales (Pandanaceae, Cyclanthaceae, Velloziaceae and Stemonaceae), with which Triuridaceae have recently been associated following analyses of molecular data. Triuridaceae have small, inaperturate (functionally monoaperturate) pollen grains with the exine reduced to gemmae which have distinctive protruberances or spines. Microsporogenesis is of the successive type. Some genera have a plasmodial tapetum. Orbicules are absent. These characters are compatible with a relationship with Pandanaceae, but a relationship with Alismatales, as suggested by earlier authors, cannot be excluded.

Key words: Triuridaceae, mycoheterotrophs, pollen, tapetum, systematics, Pandanales, Alis-matales. 

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Copyright information

© Springer-Verlag Wien 2002

Authors and Affiliations

  • C. A. Furness
    • 1
  • P. J. Rudall
    • 1
  • A. Eastman
    • 1
  1. 1.Royal Botanic Gardens, Kew, Richmond, Surrey, UKGB

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