Plant Systematics and Evolution

Endress, P. K. & Friis, E. M. (1991): Archamamelis, hamamelidalean flowers from the Upper Cretaceous of Sweden. – Pl. Syst. Evol. 175(1–2): 101–114.

Frumin, S. I. & Friis, E. M. (1999): Magnoliid reproductive organs from the Cenomanian-Turonian of north-western Kazakhstan: Magnoliaceae and Illiciaceae. – Pl. Syst. Evol. 216(3–4): 265–288.

Schönenberger, J., Pedersen, K. R. & Friis, E. M. (2001): Normapolles flowers of fagalean affinity from the Late Cretaceous of Portugal. – Pl. Syst. Evol. 226: 205–230.

Leng, Q. & Friis, E. M. (2003): Sinocarpus decussatus gen. et sp. nov., a new angiosperm with basally syncarpous fruits from the Yixian Formation of Northeast China. – Pl. Syst. Evol. 241: 77–88.

von Balthazar, M., Pedersen, K. R. & Friis, E. M. (2005): Teixeiraea lusitanica, a new fossil flower from the Early Creataceous of Portugal with affinities to Ranunculates. – Pl. Syst. Evol. 255: 55–75.

Friis, E. M., Iglesias, A., Reguero, M. A. & Mörs, T. (2017): Notonuphar antarctica, an extinct water lily (Nymphaeales) from the Eocene of Antarctica. – Pl. Syst. Evol. 3030: 969–980.