Reproductive Features of the Vitaceae

Abstract

This chapter discusses aspects of the reproductive features within the Vitaceae from the point of view of development, within a comparative systematics framework. The typical stages of inflorescence initiation and development are illustrated, as well as the variability in mature inflorescence patterns present across the clades. Likewise, the patterns of individual floral development and variations in mature flower characters are discussed and illustrated for the family. One of these, the occurrence of dioecy, is discussed at length and compared to the more typical vitaceous hermaphrodite flower. The general patterns of pollination and fertilization found in the family are discussed, as well as the structure of vitaceous berries and seeds. In many instances, what is known about reproduction in the family is based largely on what is known for Vitis. Here we show that the thyrse inflorescence, the floral calyptra, the lack of nectar and the presence of dioecy are just some of the reproductive features of Vitis that do not typify the family.