The production of floral oils byMonttea (Scrophulariaceae) and the function of tarsal pads inCentris bees |
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| Authors: | Beryl B Simpson John L Neff Gregg Dieringer |
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| Institution: | (1) Department of Botany, The University of Texas, 78713 Austin, TX, USA;(2) Central Texas Melittological Institute, 7307 Running Rope Austin, Texas, USA;(3) Department of Botany, The University of Texas, Austin, Texas, USA |
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| Abstract: | Plant species that secrete oil as their primary floral reward are rare and sporadically found in the angiosperms. We report here thatMonttea, a genus previously unsuspected of being an oil-plant, produces lipids from trichome elaiophores on the inside of the lower (anterior) lip. The discovery of the production of oils by species of this S. American genus explains the occurrence of unusual dual-function collecting structures in ArgentineCentris (Hymenoptera: Anthophoridae) and explains the presence of oil-collecting bees in regions where oil-secreting flowers were previously thought to be absent. The behavior of these centridine pollinators onMonttea flowers parallels that of oil-collecting bees onDiascia (Scrophulariaceae) in S. Africa. |
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| Keywords: | Angiosperms Scrophulariaceae Monttea Hymenoptera Anthophoridae Centris Oil-flowers oil-bees Flora of Argentina |
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