Zur Androeciumanlage und Antherenentwicklung beiCaloncoba echinata (Flacourtiaceae)

The polyandrous androecium ofCaloncoba echinata (Oliv.)Gilg initially consists of a flat, ring-like mound. On it stamen primordia arise almost simultaneously and in somewhat irregular (neither clearly centrifugal nor centripetal) sequence. This fits the development reported for other members of theGuttiferales-Violales group. The anther loculi are transversely septate as in someAnnonaceae and a few other Angiosperm families. This character does not appear to be phylogenetically primitive.