Two African genera of the Gesneriaceae, Saintpaulia and Streptocarpus, are similar in many respects. Both genera have blue to purple flowers, pollen of similar shape and exine sculpting, embryos with one-celled, uninucleate chalazal haustoria, shared vegetative structures among some species, and are among the few genera in the Gesneriaceae which include species with chromosome counts of n = 15. The similarity of these features has indicated that the two genera are likely to be closely related.
(Online publication March 1998)
* Biology Department, Boise State University, 1910 University Drive, Boise, Idaho 83725, USA.
† Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, UK.
‡ Institute of Cell and Molecular Biology, The University of Edinburgh, Kings Buildings, Mayfield Road, Edinburgh EH9 3JH, UK.