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April 19, 2026Annals of Botany

Impostors in South America: a new Batesian floral mimicry system involving orchids and Bignoniaceae models

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Authors

JCJoão C F CardosoCMCarlos A. Matallana‐PuertoRTRenata Trevizan

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Overview

Field observations reveal Batesian floral mimicry between orchids and Bignoniaceae, indicating ecological relationships in South America.

Key Points

  • This research aims to confirm the existence of Batesian floral mimicry between Galeandra montana and Jacaranda rufa in South America.
  • Investigated the mating system of G. montana and its dependence on pollinators.
  • Observed pollinators visiting G. montana and J. rufa.
  • Conducted anatomical and histochemical tests to assess rewardlessness of G. montana.
  • Quantified trait overlap using multivariate trait-space analyses.
  • Applied circular statistics and ecological niche modelling for phenological and geographical comparisons.
  • G. montana is pollinator-dependent and attracts similar bee species as J. rufa.
  • G. montana possesses osmophores but is rewardless, resembling J. rufa in floral traits.
  • 81.83% of G. montana's floral trait variation is found within J. rufa as a model.
  • Both species exhibit similar flowering times with no significant differences in distributions.
  • G. montana and J. rufa have a geographical overlap of approximately 9% in South America.

Cite This Study

Cardoso et al. (2026) studied this question.

synapsesocial.com/papers/69e471ef010ef96374d8e343https://doi.org/10.1093/aob/mcag096
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