Abstract
Erythrina breviflora is visited by large numbers of passerine birds of which orioles (Icterus: Icteridae) are the primary pollinators. The flowers produce large quantities of nectar but they are rarely visited by hummingbirds. Inflorescence and floral morphology, and low levels of sucrose in the nectar probably explain the rarity of foraging hummingbirds. A comparison of Old WorldErythrina and their pollinators with New World species pollinated by orioles and hummingbirds suggests that parallel evolution has occurred. When the comparison is expanded to include other species pollinated by orioles, it is clear that various New WorldIcteridae, Thraupidae, etc. are ecological equivalents of Old WorldOriolidae, Pycnonotidae, Sturnidae, etc. and that flowers pollinated by these birds have similar characteristics.
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Cruden, R.W., Toledo, V.M. Oriole pollination ofErythrina breviflora (Leguminosae): Evidence for a polytypic view of ornithophily. Pl Syst Evol 126, 393–403 (1977). https://doi.org/10.1007/BF00986292
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DOI: https://doi.org/10.1007/BF00986292