Krameria, free fatty acids and oil-collecting bees
BERYL B. SIMPSON*, JOHN L. NEFF† & DAVID SEIGLER‡
*Department of Botany, Smithsonian Institution, Washington DC 20560
†Division of Natural Sciences, University of California, Santa Cruz, California 95064
‡Department of Botany, University of Illinois, Urbana, Illinois 61801
VOGEL'S report1,2 of the production of glycerides rather than nectar as rewards gathered by bees described an association involving several genera of insects and numerous plant families. We report here that members of the Krameriaceae produce floral lips more unusual than those described by Vogel2. Our data also provide evidence that the oils of Krameria are collected by bees of only one genus, Centris (Anthophoridae), and used, mixed with pollen, as larval food.
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© 1977 Nature Publishing Group