Adnation in plants is the `union of unlike parts; organically united or fused with another dissimilar part, e.g. an ovary to a calyx tube, or stamens to petals`. This is in contrast to connation, the fusion of similar organs. ... Found on http://en.wikipedia.org/wiki/Adnation
(from the article `angiosperm`) Floral organs are often united or fused: connation is the fusion of similar organse.g., the fused petals in the morning glory; adnation is the ... Found on http://www.britannica.com/eb/a-z/a/20