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E.M. Friis, K.R. Pedersen, and J. Schönenberger Endressianthus, a new Normapolles producing plant genus of fagalean affinity from the Late Cretaceous of Portugal Int J Plant Sci 164 5 Suppl. 2003 S201 S223 Endressianthus is the most completely known Normapolles flower. It is excellently preserved and provides information on inflorescence structure, staminate and pistillate flowers, and pollen that give a better understanding of the Cretaceous diversification of Fagales.
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Q. Leng, and E.M. Friis Sinocarpus decussatus gen. et sp. nov, a new angiosperm with syncarpous fruits from the Yixian Formation of Northeast China Pl Syst Evol 241 2003 77 88 The extinct genus Sinocarpus described in this work from the Early Cretaceous of north western China is significant in being the earliest fossil flower with a syncarpous gynoecium. Its distinct morphology indicates affinity with eudicots and shows that angiosperms in the Jehol Biota were diversified to some extent.
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