transitional-combinational theory

Gurcharan Singh singhg at SATYAM.NET.IN
Wed Mar 31 21:50:09 CST 2004

BlankStuessy in Taxon (Feb, 2004) proposes transitional-combinational theory
of origin of angiosperms. He believes that it took 100 mya to develop three
characteristics of angiosperms: carpels, double fertilization and finally
flowers. Do we have enough record of this long transition?


Dr. Gurcharan Singh
Department of Botany                  Res. 932 Anand Kunj
S. G. T. B. Khalsa College                    Vikas Puri
University of Delhi                                 New Nelhi-110018
Delhi-110007, INDIA                            INDIA
Phone: 27666469                                Phone: 25531534,
                       mail: singhg at
                               chani at
                               singhg45 at


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