Cover illustration: Nectar secreted by corolla-borne glandular trichomes constitutes a substitutive floral nectar source in Lundia (Bignoniaceae), which has a non functional disc. While many species of this genus appear to have adopted a deceptive syndrome, the reappearance of nectar production in Lundia cordata suggests that a reversal from deceit to reward has taken place in some taxa of Lundia. See Lopes et al., pp. 169-174.
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