BACKGROUND AND AIMS Asexual organisms are more widespread in previously glaciated areas than their sexual relatives ('geographical parthenogenesis'). In plants, this pattern is probably dependent on reproductive isolation and stability of cytotypes within their respective distribution areas. Both partial apomixis and introgressive hybridization potentially destabilize the spatial separation of ...

Heinrich Wilhelm Schott (1794–1865) was one of the pioneering researchers in taxonomy species-rich monocot family Araceae. He described numerous new plant species various genera, including Acorus, which is currently segregated as a monogeneric and order occupying position sister to rest monocots. While describing his mostly used characters that are considered low, if any, taxonomic value. His d...

BACKGROUND AND AIMS Chromosomal evolution, including numerical and structural changes, is a major force in plant diversification and speciation. This study addresses genomic changes associated with the extensive chromosomal variation of the Mediterranean Prospero autumnale complex (Hyacinthaceae), which includes four diploid cytotypes each with a unique combination of chromosome number (x = 5, ...

The Odontites vernus group is the most widespread of genus Odontites, occupying temperate regions Eurasia and northern Morocco. contains three species, all inhabiting Iberian Peninsula, where O. s.l. (sensu lato) exhibits remarkable morphological variability includes diploid tetraploid individuals corresponding to two subspecies that occur there. We collected 301 from 100 sampling sites coverin...