Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2000 Nov 21;97(24):12939-41.
doi: 10.1073/pnas.97.24.12939.

Progress in understanding angiosperm history, success, and relationships: Darwin's abominably "perplexing phenomenon"

W L Crepet  1
Affiliations
Review

Progress in understanding angiosperm history, success, and relationships: Darwin's abominably "perplexing phenomenon"

W L Crepet. Proc Natl Acad Sci U S A. .
No abstract available

PubMed Disclaimer

Figures

Figure 1
Figure 1
(a) A typical morphology-based phylogeny of existing seed plants (plus the extinct Bennettitales) illustrating (in bold type) the anthophyte clade. (b) A composite phylogeny illustrating the realignment of Bennettitales and Gnetales based on ITS and new morphological data (21).
Figure 2
Figure 2
A three-dimensionally preserved Cretaceous (Turonian) flower similar to modern Nymphaea (scanning electron micrograph by Jennifer Svitko).
Figure 3
Figure 3
(a) A reconstruction of Paleoclusia, a Cretaceous relative of modern Clusiaceae, a family closely associated with meliponine bee pollinators. (b) A reconstruction of an extinct (Cretaceous, Turonian) ericalean flower typical of a complex that includes several adaptations for pollination by derived anthophilous insects clawed petals and pollen in polyads. (Reconstructions by Michael Rothman.) (c) Appearance of floral innovations (●) during the Aptian (Ap)-Albian (Ab)-Cenomanian (C)-Turonian (T) interval vs. appearance of new floral characters/million years (○). (d) Angiosperm radiation in the Aptian–Turonian interval (based on ref. ; ○) vs. rate of appearance of new floral characters during the same interval (●).
See this image and copyright information in PMC

Comment on

References

    1. Darwin C. In: More Letters form Charles Darwin. Darwin F, Seward A C, editors. Vol. 2. New York: Appleton; 1903. pp. 239–240. and 20–22.
    1. Crane P R, Friis E M, Pedersen K R. Nature (London) 1995;374:27–33.
    1. Dilcher D L, Crane P R. Ann Mo Bot Gard. 1984;71:351–383.
    1. Crepet W L. Rev Paleob Palyn. 1996;90:339–359.
    1. Nixon K C. Cladistics. 1999;15:407–414. - PubMed

LinkOut - more resources