Niklas (1997, pg 205) writes: "Attempts to lay the success of the angiosperms squarely on the reproductive virtuosity of the flower are easily thwarted. Some of the most successful flowering species have totally abandoned sexual reproduction. For example, although it has all the accouterments for sexual reproduction the common dandelion produces seeds with viable embryos not from the fusion of sperm and egg but from the asexual division of cells within the nucellus."