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The oils consist of fatty acids and/or glycerides, but may also contain other components such as , , , , , , phenolic compounds, and .
Elaiophores occur in the flowers of some families, such as Malpighiaceae, Scrophulariaceae, Iridaceae, Cucurbitaceae, Primulaceae and Solanaceae. Elaiophores can be present on the axial part of the sepals or corollas, on the surface of the Perianth, at the base of Stamen (as in Lysimachia vulgaris) and also on the callus.
The oils secreted by the elaiophores act as attractants for pollinating insects. Representatives of several bee families collect these oils to add to the food of the larvae or to line the nest, including the families and subfamilies Melittidae, Ctenoplectrini, Apidae and Anthophorini. Bees of the subfamily Ctenoplectrini have specialized oil-collecting structures such as pads or combs on the ventral thorax or on the front and middle legs. Bees visiting flowers with trichome elaiophores generally have pads, and bees visiting flowers with epithelial elaiophores have brush-like combs.
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