One of the most critical uses of foliar characters is in interpreting the angiosperm fossil record. Although fossil reproductive structures comprise an important source of data (e.g., Friis and Skarby, 1982; Basinger and Dilcher, 1984; Herendeen et al., 1999; Crepet et al., 2004; Friis et al., 2006), compressions and impressions of leaves are the most common macroscopic angiosperm fossils. Beca…