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Oecologia

, Volume 39, Issue 1, pp 107–121 | Cite as

Pollinator availability as a determinant of flowering time in ocotillo (Fouquieria splendens)

  • Nickolas M. Waser
Article

Summary

Ocotillo, a perennial shrub of Sonoran and Chihuahuan Deserts, produces its red tubular flowers in spring. This timing coincides with northward migration of hummingbirds through desert areas. Observations of visitors, pollen collections, and seed set reductions following exclusion of different flower visitors indicate that both hummingbirds and solitary bees pollinate ocotillo in southern Arizona. Seed sets of flowers on marked plants varied considerably within and between years, and this variation was related to the temporal match between flowering and hummingbird migration. This suggests that selection acts on plants to synchronize flowering with periods of pollinator abundance.

Keywords

Migration Flowering Time Desert Area Flower Visitor Chihuahuan Desert 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • Nickolas M. Waser
    • 1
  1. 1.Department of Ecology and Evolutionary BiologyUniversity of ArizonaTucsonUSA

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