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Early Flowers and Angiosperm Evolution
This work has highlighted the importance of understanding the environmental context of early angiosperm evolution in the context of extant and fossil seed plants, as well as the history and evolution of pollination in angiosperms.
Cretaceous angiosperm flowers: Innovation and evolution in plant reproduction
The origin and early diversification of angiosperms
New palaeobotanical discoveries and phylogenetic analyses of morphological and molecular data have clarified the initial phases of this radiation and changed the perspective on early angiosperm evolution, though important issues remain unresolved.
Early cretaceous (early to middle Albian) platanoid inflorescences associated with Sapindopsis leaves from the Potomac Group of eastern North America
Fossil evidence of water lilies (Nymphaeales) in the Early Cretaceous
The history of the water lilies (Nymphaeales) is extended back to the Early Cretaceous and into the oldest fossil assemblages that contain unequivocal angiosperm stamens and carpels, adding to the growing congruence between results from molecular-based analyses of relationships among angiosperms and the palaeobotanical record.
Diversity in obscurity: fossil flowers and the early history of angiosperms
- E. M. Friis, K. Pedersen, P. Crane
- Geography, Environmental SciencePhilosophical Transactions of the Royal Society B…
- 12 February 2010
Angiosperms were clearly present in the Early Cretaceous, 20–30 Myr before they attained the level of ecological dominance reflected in some mid-Cretaceous floras, and angiosperm leaves and pollen show a distinct pattern of steadily increasing diversity and complexity through this interval.
Early angiosperm diversification : The diversity of pollen associated with angiosperm reproductive structures in early Cretaceous floras from Portugal
On the evolutionary history of Ephedra: Cretaceous fossils and extant molecules.
- C. Rydin, K. Pedersen, E. M. Friis
- GeographyProceedings of the National Academy of Sciences…
- 23 November 2004
Fossil seeds from Buarcos, Portugal, unequivocally link one type of Cretaceous polyplicate pollen to Ephedra and document that plants with unique characters, including the peculiar naked male gametophyte, were established already in the Early Cret Jurassic.
Lauraceous Flowers from the Potomac Group (Mid-Cretaceous) of Eastern North America
- A. Drinnan, P. Crane, E. M. Friis, K. Pedersen
- Environmental ScienceBotanical Gazette
- 1 September 1990
Mauldinia mirabilis is the first unequivocal documentation of Lauraceae from the Cretaceous and provides further evidence for considerable diversity among magnoliid dicotyledons at an early phase in angiosperm diversification.
Virginianthus calycanthoides gen. et sp. nov.-A Calycanthaceous Flower from the Potomac Group (Early Cretaceous) of Eastern North America
- E. M. Friis, Helena Eklund, K. Pedersen, P. Crane
- Environmental ScienceInternational Journal of Plant Sciences
- 1 November 1994
A new well-preserved fossil flower, Virginianthus calycanthoides gen. et sp.