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KeywordsChorisia, Tabebuia, late-acting self-incompatibility.The neotropical trees Chorisia chodatii. C. speciosa. Tabebuia caraiba and T. ochracea show late-acting self-incompatibility. Accumulated ovule penetrations following self-pollinations were similar to those in crosses. During the six to eight day period following pollination, in both selfed and crossed ovules, a resting zygote with initial development of the endosperm was formed. Up until the time of rejection of the selfed flowers, no cytological malfunctions were evident in the selfed ovules.Nettancourt (1977) "late-acting" or "intra-ovarian" SI are referred to for only two species, Lotus corniculatus L. and Theobroma cacao L. Seavey and Bawa (1986) redressed this neglect to some extent by drawing attention to about 20 species with what they called "late-acting self-incompatibility" (effectively, the rejection of selfed flowers/pistils after self-pollen tubes have entered the ovary) although very few of these taxa have been studied in any detail.

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