A biosystematic study of Pelargonium section Ligularia: 2. Reappraisal of section Chorisma

Abstract

Macromorphological, palynological and karyological studies indicate a close relationship between Pelargonium exhibens Vorster, P. mollicomum Fourcade, P. tetragonum (L.f.) L’Hérit. and P worcesterae Knuth. The relationship was confirmed by a study of the rbcL gene sequences and an analysis of phenolic compounds. The four species are placed in the newly circumscribed section Chorisma DC. Taxonomic treatments of the section and the species are presented. Makromorfologiese, palinologiese en kariologiese studies dui 'n noue verwantskap tussen Pelargonium exhibens Vorster. P. mollicomum Fourcade, P tetragonum (L.f.) L'Hérit, en P. worcesterae Knuth aan. Die verwantskap is bevestig deur 'n sludie van die rhcL-geen-volgordes en 'n analise van fenoliese verbindings. Die vier spesies word in die nuut-omlynde seksie Chorisma DC. geplaas. Taksonomiese uiteensettings van die seksie en spesies word aangebied.