PMID: 16532206Mar 15, 2006Paper

Flower morphology, nectar features, and hummingbird visitation to Palicourea crocea (Rubiaceae) in the Upper Paraná River floodplain, Brazil

Anais Da Academia Brasileira De Ciências
Luciana B Mendonça, Luiz dos Anjos

Abstract

We investigated flower morphology, nectar features, and hummingbird visitation to Palicourea crocea (Rubiaceae), a common ornithophilous shrub found in the riparian forest understory in the Upper Paraná River floodplain, Brazil. Flowers are distylous and the style-stamen dimorphism is accompanied by other intermorph dimorphisms in corolla length, anther length, and stigma lobe length and form. We did not observe strict reciprocity in the positioning of stigma and anthers between floral morphs. Flowering occurred during the rainy season, October to December. Nectar standing crop per flower was relatively constant throughout the day, which apparently resulted in hummingbirds visiting the plant throughout the day. Energetic content of the nectar in each flower (66.5 J) and that required daily by hummingbird visitors (up to 30 kJ) would oblige visits to hundreds of flowers each day, and thus movements between plants that should result in pollen flow. Three hummingbird species visited the flowers: the Gilded Sapphire (Hylocharis chrysura), the Black-throated Mango (Anthracothorax nigricollis), and the Glittering-bellied Emerald (Chlorostilbon aureoventris). The frequency of hummingbird visitation, nectar features, and the scarcity o...Continue Reading

References

May 1, 1990·Trends in Ecology & Evolution·S C Barrett
Jan 1, 2002·American Journal of Botany·Maria Clara CastellanosJames D Thomson
Aug 1, 1979·Oecologia·Alan B BoltenIrene Baker

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Citations

Sep 10, 2009·Brazilian Journal of Biology = Revista Brasleira De Biologia·L B MendonçaL Anjos
Sep 2, 2011·Brazilian Journal of Biology = Revista Brasleira De Biologia·L C Rodrigues, A C Araujo
Jun 12, 2021·Integrative and Comparative Biology·A J SargentA Rico-Guevara

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