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Item Description Ganders, Fred R. en_US Nagata, Kenneth M. en_US 2009-08-28T22:36:19Z 2009-08-28T22:36:19Z 1983-11 en_US
dc.identifier.citation Ganders FR, Nagata KM. 1983. Relationships and floral biology of Bidens cosmoides (Asteraceae). Lyonia 2(3):23-32. en_US
dc.description p. [23]-32: ill.; 23 cm. en_US
dc.description.abstract Bidens cosmoides, in the monotypic section Degeneria, is a morphologically unique species endemic to Kaua'i. Contrary to previous reports it will hybridize successfully with other Hawaiian species of Bidens, all in section Campylotheca. All Hawaiian species of Bidens are interfertile, suggesting that they are the products of adaptive radiation from a single ancestral introduction rather than two separate introductions and lineages as previously postulated. The elongated styles of B. cosmoides, exserted 20-30 mm beyond the corollas, that present pollen on the style tips, are unique in the genus. Flowers produce more than 30 times as much nectar by volume than do other Hawaiian species of Bidens, but the sugar concentration of the nectar is only half that of other species (30% vs. 60%). These unique floral features appear to represent adaptations to pollination by birds, although pollination of B. cosmoides has not yet been observed in nature. en_US
dc.format.extent 10 p. en_US
dc.language.iso en-US en_US
dc.publisher Harold L. Lyon Arboretum en_US
dc.subject.lcsh Bidens -- Hawaii -- Kauai. en_US
dc.title Relationships and floral biology of Bidens cosmoides (Asteraceae) en_US
dc.type Article en_US
dc.type.dcmi Text en_US
dc.identifier.lcc 74-620038 en_US

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