SUM M A R YThe neotropical, monoecious, forest species Stercidia chicho has been shown to have flowers which are adapted for pollination by Diptera, such as mediutn-sized species of the sapromyophilous genera Acrogtossa, Cochliomya, Gaemnochaetopsis, Ornidia and Parasarcophaga. Controlled pollination experiments show that the species is self-incompatible. The fact that pollen tube growth proceeds to the ovule following both compatible and incompatible pollinations suggests that the incompatibility mechanism is based on the non-fusion of gametes iti the embryo sac, as in the ' Tlteot>roma-type\ originally known only in the related Theohrnma cacao.
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