American Journal of Botany. "How ancient flowering plants grew: Early angiosperms were weedy, fast-growing." ScienceDaily. www.sciencedaily.com / releases / 2010 / 03 / 100323110101.htm (accessed ...

Fossils of angiosperms first appear in the fossil record about 140 million years ago. Based on the material in which these fossils are deposited, early angiosperms must have been weedy, fast ...