Plant Systematics and Evolution

, Volume 183, Issue 1–2, pp 83–97 | Cite as

Subdivision ofPelargonium sect.Cortusina (Geraniaceae)

  • L. L. Dreyer
  • F. Albers
  • J. J. A. Van der Walt
  • D. E. Marschewski


The sect.Cortusina (Dc.)Harv. s.l. is divided into the sectt.Cortusina (Dc.)Harv. s. str. andReniformia (Knuth)Dreyer, comb. nov.,P. cortusifoliumL'Hérit.,P. crassicauleL'Hérit.,P. echinatumCurt.,P. magenteumJ. J. A. Van der Walt, andP. sibthorpifoliumHarv. remain in the sect.Cortusina s. str., while the speciesP. albumJ. J. A. Van der Walt,P. dichondrifoliumDc.,P. odoratissimum (L.)L'Hérit.,P. reniformeCurt., andP. sidoidesDc. are removed from the sect.Cortusina s.l. and included in the revised sect.Reniformia. Both sections are well characterized by morphological, anatomical, karyological and palynological features. The chromosomes ofCortusina s. str. are small and based upon x = 11; those ofReniformia are larger and based upon x = 8. The size and surface sculpture of the pollen grains differ markedly between the two sections. Flavones and hydrolysable tannins occur in sect.Reniformia, but are absent in sect.Cortusina s. str. After hydrolysis hydroxybenzoic acids, which are present in large amounts inReniformia, occur only in traces inCortusina. The two sections also occupy distinctly different geographical areas. A close relationship between sect.Reniformia and some species of sect.Ligularia (Sweet)Harv. is indicated by the occurrence of artificial hybrids.

Key words

Geraniaceae Pelargonium sectt.Cortusina andReniformia Morphology anatomy karyology palynology chemotaxonomy geographical distribution hybrids 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Albers, F., 1988: Strategies in chromosome evolution inPelargonium (Geraniaceae). — Monogr. Syst. Bot. Gard.25: 499–502.Google Scholar
  2. —,Gibby, M., Austmann, M., 1992: A reappraisal ofPelargonium sect.Ligularia (Geraniaceae). — Pl. Syst. Evol.179: 257–276.Google Scholar
  3. —,Van der Walt, J. J. A., 1984: Untersuchungen zur Karyologie und Mikrosporogenese vonPelargonium sect.Pelargonium (Geraniaceae). — Pl. Syst. Evol.147: 177–188.Google Scholar
  4. Bathe-Smith, E. C., 1972: Detection and determination of ellagitannins. — Phytochemistry11: 1153–1156.Google Scholar
  5. Bortenschlager, S., 1967: Vorläufige Mitteilungen zur Pollenmorphologie in der Familie der Geraniaceen, und ihre systematische Bedeutung. — Grana Palynologica7: 400–468.Google Scholar
  6. De Candolle, A. P., 1824: Prodromus systematis naturalis regni vegetabilis. — Paris: Treutel et Würtz.Google Scholar
  7. Dreyer, L. L., Van der Walt, J. J. A., 1990: A new species ofPelargonium from the eastern Transvaal. — S African J. Bot.56: 65–67.Google Scholar
  8. - - 1992: Delimitation ofPelargonium sect.Reniformia (Geraniaceae). — S African J. Bot. (in press).Google Scholar
  9. Ecklon, C. F., Zeyher, K. L. P., 1835: Enumeratio plantarum africae australis extratropicae. — Hamburg.Google Scholar
  10. Harvey, W. H., 1860:Geraniaceae. — InHarvey, W. H., Sonder, O. W., (Eds): Flora Capensis1. — Dublin: Hodges, Smith & Co.Google Scholar
  11. Joel, D. M., 1983: A. G. S. (Alcian Green-Safranin)—a simple differential staining of plant material for light microscopy. — Proc. R. M. S.18: 149–151.Google Scholar
  12. Johansen, D. A., 1940: Plant microtechnique. — New York: McGraw-Hill.Google Scholar
  13. Knuth, R., 1912:Geraniaceae. — InEngler, A., (Ed.): Das Pflanzenreich4, 129: 1–640. — Leipzig: Engelmann.Google Scholar
  14. Leistner, O. A., Morris, J. W., 1976: South African place names. — Ann. Cape Prov. Mus.12: 1–565.Google Scholar
  15. Maggs, G. L., 1987: Taxonomic studies in the sectionPolyactium ofPelargonium (Geraniaceae). — M. Sc. thesis, University of Stellenbosch (unpublished).Google Scholar
  16. Marais, E. M., 1981: Die taksonomiese waarde van die blom vanPelargonium (Geraniaceae). — M. Sc. thesis, University of Stellenbosch (unpublished).Google Scholar
  17. Snow, R., 1963: Alcoholic hydrochloric acid-carmine as a stain for chromosomes in squash preparations. — Stain Technol.38: 9–13.PubMedGoogle Scholar
  18. Van der Walt, J. J. A., 1977: Pelargoniums of Southern Africa1. — Cape Town: Purnell & Sons.Google Scholar
  19. —,Vorster, P. J., 1981: Pelargoniums of Southern Africa2. — Cape Town: Juta & Co.Google Scholar
  20. —, —, 1988: Pelargoniums of Southern Africa3. — Kirstenbosch: National Botanic Gardens.Google Scholar
  21. —, 1990: Delimitation ofPelargonium sect.Glaucophyllum (Geraniaceae). — Pl. Syst. Evol.171: 15–26.Google Scholar
  22. Weather Bureau, 1984: Climate of South Africa40. — Pretoria: The Government Printer.Google Scholar
  23. Yu, S. N., 1985: Untersuchungen zur interspezifischen Kompatibilität und Biosystematik bei der GattungPelargonium. — Diss. Fak. Landw. u. Gartenb. Techn. Univ. München-Weihenstephan.Google Scholar
  24. —,Horn, W., 1988: Additional chromosome numbers inPelargonium (Geraniaceae). — Pl. Syst. Evol.159: 165–171.Google Scholar

Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • L. L. Dreyer
    • 1
  • F. Albers
    • 2
  • J. J. A. Van der Walt
    • 1
  • D. E. Marschewski
    • 2
  1. 1.Department of BotanyUniversity of StellenboschStellenboschRepublic of South Africa
  2. 2.Institut für BotanikWestfälische Wilhelms-UniversitätMünsterFederal Republic of Germany

Personalised recommendations