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Plant Systematics and Evolution

, Volume 217, Issue 1–2, pp 101–117 | Cite as

Pollination mechanism in southern Brazilian orchids which are exclusively or mainly pollinated by halictid bees

  • Rodrigo B. Singer
  • Andrea A. Cocucci
Article

Abstract

The pollination process is documented in three sympatric orchids found in Curitiba, Paraná State, southern Brazil. InCampylocentrum aromaticum (Epidendroideae: Angraeciinae) andPrescottia densiflora (Spiranthoideae: Prescotiinae) halictid bees act as main pollinators with minor contributions from other insects, such as Syrphid flies. Because of the pollinarium and column structure inCyclopogon diversifolius. (Spiranthoideae, Spiranthinae), halictid bees are the only insects capable of performing pollination. In the three studied species pollinarium removal and deposition are achieved by interaction between the column and bee's mouth parts. Morphological and ecological flower features in agreement with this pollination mode are discussed and pollination by halictid bees is suggested to occur in a number of South American orchids.

Key words

Orchidaceae Campylocentrum Cyclopogon Prescottia Halictidae Bee pollination flower morphology 

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Rodrigo B. Singer
    • 1
  • Andrea A. Cocucci
    • 2
  1. 1.Pós- graduação em BotânicaUniversidade Federal do ParanáCuritibaBrazil
  2. 2.Instituto Multidisciplinario de Biologia VegetalCórdobaArgentina

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