Conservation of mass makes flowers and butterflies both fascinating to me. How does a caterpillar enter a cocoon and, without taking any other mass into itself come out as a butterfly. That kind of transformation must take a tremendous amount of energy, which must be consume as mass, and yet the butterfly is seemingly larger — though probably less dense than the caterpillar.
The same goes for plants. A very tiny seed takes water and nutrients from the dirt and grows into something many hundred (or thousand) times larger. I have a hard time imagining that the mass that makes up plants was once in the dirt. There ought to be some way to way it before the plant grew in it and after to see where the mass of the flower comes from.