Floral morphology and anatomy of Ophiocaryon, a paedomorphic genus of Sabiaceae

Annals of Botany
P ThaowetsuwanLouis P Ronse De Craene

Abstract

Ophiocaryon is a lesser known genus in Sabiaceae. This study examines flowers of six Ophiocaryon species in comparison with Meliosmaalba, to identify taxonomically informative characters for understanding relationships within the family Sabiaceae, to imply previously unknown pollination mechanisms of Ophiocaryon, and to contribute to the placement of Sabiaceae within the early-diverging eudicots. Floral morphology and anatomy of six Ophiocaryon species and M. alba were studied and described using scanning electron microscopy, clearing techniques and resin sectioning. Novel characters of Ophiocaryon were identified, e.g. conical cells on petals, different kinds of orbicules in anthers, stomata on nectary appendage tips and ovary, two distinct surface patterns on stamens and ovary, tanniferous cell layers in the ovary wall, and acorn-shaped unitegmic ovules with very short integuments. Comparison of floral characters between Ophiocaryon and Meliosma found that the calyx, corolla, androecium and gynoecium of Ophiocaryon resemble an undeveloped state of the latter taxon, reflecting a paedomorphic regression of the flower of Ophiocaryon. The flower morphology and anatomy of Ophiocaryon was compared with its putative sister species M...Continue Reading

References

Mar 17, 2010·Trends in Plant Science·Mathew S Box, Beverley J Glover
Apr 8, 2011·Annals of Botany·Heather M WhitneyBeverley J Glover
May 27, 2011·American Journal of Botany·Douglas E SoltisPamela S Soltis
Nov 1, 2007·American Journal of Botany·Livia Wanntorp, Louis P Ronse De Craene
Mar 19, 2015·American Journal of Botany·Louis P Ronse De CraeneLivia Wanntorp

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Citations

May 22, 2021·American Journal of Botany·Juliana LovoRenato Mello-Silva

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